fabricate - put together out of components or parts; "the company fabricates plastic chairs"; "They manufacture small toys"to make up something that is not true (a story, accusation etc) to fabricate an excuse 
façade  - nthe front of a building the façade of the temple 
facet -naspect; phase: They carefully examined every facet of the argument. 
facetious - cleverly amusing in tone; "a bantering tone"; "facetious remarks"; 
facile -moving, acting, working, proceeding, etc., with ease, sometimes with superficiality: facile fingers; a facile mind.  arrived at without due care or effort; lacking depth; "too facile a solution for so complex a problem"
facilitate -alleviate, ease v make easier; "you could facilitate the process by sharing your knowledge"
faction - a group or clique within a larger group, party, government, organization, or the like: a faction in favor of big business.  a clique (often secret) that seeks power usually through intrigue
factitious - not produced by natural forces; "brokers created a factitious demand for stocks" factitious laughter; factitious enthusiasm  made; manufactured: a decoration of factitious flowers and leaves. 
faculty -  nقُدْرَه، قُوَّه  مَقْدِرَه، مَهارَهan ability, natural or acquired, for a particular kind of action: a faculty for making friends easily. one of the powers of the mind, as memory, reason, or speech: Though very sick, he is in full possession of all his faculties a natural power of the bodythe faculty of hearing  ability or skill She has a faculty for saying the right thing. 
fallacious - containing or based on a fallacy; "fallacious reasoning"; "an unsound argument"deceptive; misleading: fallacious testimony.  containing a fallacy; logically unsound: fallacious arguments
fallacy. - n  مُغالَطَه  a wrong idea or belief, usually one that is generally believed to be true; false reasoning That belief is just a fallacy. 
fallible - قابِل للخَطَأ liable to be erroneous or false; not accurate: fallible information. likely to fail or be inaccurate; "everyone is fallible to some degree"
falsify - fake or falsify; "Fudge the figures"; "cook the books"; "falsify the data to make false or incorrect, esp. so as to deceive: to falsify income-tax reports.  He falsified the accounts. 
fallow - adj cultivated land that is not seeded for one or more growing seasons  not in use; inactive: My creative energies have lain fallow this year. 
falter - v  يَتَلَعْثَم يَتَرَنَّحto hesitate or waver in action, purpose, intent, etc.; give way: Her courage did not falter at the prospect of hardship. to stumble or hesitate She walked without faltering. 
stumble تعثّر‎ to strike the foot against something, as in walking or running, so as to stagger or fall; trip. 
Fanaticism  -تَعَصُّب  too great enthusiasm, especially about religionFanaticism is the cause of most religious hatred. 
fanatic - a person motivated by irrational enthusiasm (as for a cause); "A fanatic is one who can't change his mind and won't change the subject"--
fancied - formed or conceived by the imagination; "a fabricated excuse for his absence"; "a fancied wrong"; "a fictional character"; "used fictitious names"; "a made-up story
fancier -n One who has a special enthusiasm for or interest in something: a fancier of antiques  a fancier of sports cars. 
fanciful - نَزَوي، غَريب الأطوار، وهْميindulging in or influenced by fancy; "a fanciful mind"; "all the notional vagaries of childhood"v Created in the fancy; unreal: a fanciful story  characterized by or showing fancy; capricious or whimsical in appearance: a fanciful design of butterflies and flowers. inclined to have fancies, especially strange, unreal ideas She's a very fanciful girl.  imaginary or unreal That idea is rather fanciful. 
fancy - يَتَخَيَّل فِكْرَه وَهْمِيَّهthe power of the mind to imagine things She had a tendency to indulge in flights of fancy something imagined He had a sudden fancy that he could see Spring approaching. decorated; not plain fancy cakes  to think or have a certain feeling or impression (that) I fancied (that) you were angry. 
farce -any funny or stupid situation in real lifeThe meeting was an absolute farce
fastidious - giving and careful attention to detail; hard to please; excessively concerned with cleanliness; "a fastidious and incisive intellect"; "fastidious about personal cleanliness"excessively particular, critical, or demanding; hard to please: a fastidious eater. very critical and difficult to please She is so fastidious about her food that she will not eat in a restaurant. 
fatalism - a philosophical doctrine holding that all events are predetermined in advance for all time and human beings are powerless to change them the acceptance of all things and events as inevitable; submission to fate: Her fatalism helped her to face death with stoic calm. 
fathom - n v to penetrate to the truth of; comprehend; understand: to fathom someone's motives.  I cannot fathom why she should have left home. a measure of depth of water (6 feet or 1.8 metres) The water is 8 fathoms deep. 
fatuous - complacently or inanely foolish
fauna- n the animals of a district or country as a whole She is interested in South American fauna
fawn 0-(also adjective) (of) its colour, a light yellowish brown: a fawn sweater  (with upon) to be too humble or to flatter (someone) in a servile way The courtiers fawned upon the queen. 
feasible - adjcapable of being done, effected, or accomplished: a feasible plan.   a feasible solution to the problem 
febrile - of or relating to or characterized by fever; "a febrile reaction caused by an allergen"
fecund - intellectually productive; "a prolific writer"; "a fecund imagination
fertile - adjbearing, producing, or capable of producing vegetation, crops, etc., abundantly; prolific: fertile soil  fertile fields; a fertile mind/imagination 
feign -v  to represent fictitiously; put on an appearance of: to feign sickness. To give a false appearance of: feign sleep. To represent falsely; pretend to: feign authorship of a novel. To imitate so as to deceive: feign another's voice.  To fabricate: feigned an excuse. 
feigned - not genuine; "feigned sympathy" a feigned modesty  feigned enthusiasm.  disguised: a feigned voice.   
felicitous -well-suited for the occasion, as an action, manner, or expression; apt; appropriate: The chairman's felicitous anecdote set everyone at ease.  exhibiting an agreeably appropriate manner or style; "a felicitous speaker"felicitous - marked by good fortune; "a felicitous life"; "a happy outcome"
felicity. n-the state of being happy, esp. in a high degree; bliss: marital felicity. 
felon - na person who is guilty of a serious crime
felony - a serious crime (such as murder or arson) an offense, as murder or burglary, of graver character than those called misdemeanors, esp. those commonly punished in the U.S. by imprisonment for more than a year. 
feral - wild and menacing; "a ferocious dog"
ferment - v  be in an agitated or excited state; "The Middle East is fermenting"; "Her mind ferments  to excite or be excited: He is the kind of person to ferment trouble.
ferret - search and discover through persistent investigation; "She ferreted out the truth"
fervent -Adj  having or showing great warmth or intensity of spirit, feeling, enthusiasm, etc.; ardent: a fervent admirer; a fervent plea.  characterized by intense emotion; "ardent love"; "an ardent lover"; "a burning enthusiasm"; "a fervent desire to change society"; "a fervent admirer"; "fiery oratory"; "an impassioned appeal"; "a torrid love affair"
fervid - Adj heated or vehement in spirit, enthusiasm, etc.: a fervid orator
fervor -n great warmth and earnestness of feeling: to speak with great fervor. 
fester - a sore that has become inflamed and formed pus
festive - إحْتِفالي، بَهيج  pertaining to or suitable for a feast or festival: festive decorations; a festive meal.   joyous; merry: a festive mood. offering fun and gaiety; "a gala ball after the inauguration"; "a festive (or festal) occasion"; "gay and exciting night life"; "a merry evening"
fete -  a day of celebration; holiday: The Fourth of July is a great American fete.  a festive celebration or entertainment: The ball was the greatest fete of the season. have a celebration; "They were feting the patriarch of the family"; "After the exam, the students were celebrating"
fetid - offensively malodorous; "a putrid smell"  a fetid pool of water 
fetich - fetish nتَميمَهan object regarded with awe as being the embodiment or habitation of a potent spirit or as having magical potency.an object worshipped, especially because a spirit is supposed to lodge in it
fiasco -N  a complete failure The party was a fiasco. 
fiat - an authoritative decree, sanction, or order: a royal fiat. 
fickle - Adj marked by erratic changeableness in affections or attachments; "fickle friends"; "a flirt's volatile affections  fickle weather.  not constant or loyal in affections: a fickle lover. 
fictitious -created, taken, or assumed for the sake of concealment; not genuine; false: fictitious names   not real or based on fact All the characters in the book are fictitious. created, taken, or assumed for the sake of concealment; not genuine; false: fictitious names.  formed or conceived by the imagination; "a fabricated excuse for his absence"; "a fancied wrong"; "a fictional character"; "used fictitious names"; "a made-up story"
fidelity -N  strict observance of promises, duties, etc.: a servant's fidelity.  faithfulness or loyalty his fidelity to his wife; fidelity to a promise 
figment -شيء مختلق  a contrived or fantastic idea; "a figment of the imagination" a mere product of mental invention; a fantastic notion: The noises in the attic were just a figment of his imagination. 
figurative - (used of the meanings of words or text) not literal; using figures of speech; "figurative language" a figurative expression. 
figure -   --- a person's public image or presence: a controversial political figure. 
figurine -a small ornamental figure of pottery, metal, plastic, etc.; statuette.   a small statue of a person china figurines of Spanish ladies 
filch -V  to steal (esp. something of small value); pilfer: to filch ashtrays from fancy restaurants.  Who has filched my pen? 
filial - Adj of, pertaining to, or befitting a son or daughter: filial obedience. 
filibusterer - a legislator who gives long speeches in an effort to delay or obstruct legislation that he (or she) opposes
filigree - delicate and intricate ornamentation (usually in gold or silver or other fine twisted wire)
finale - N the last piece, division, or movement of a concert, opera, or composition.  the temporal end; the concluding time; "the stopping point of each round was signaled by a bell"; "the market was up at the finish"; "they were playing better at the close of the season" The whole cast of the concert appeared in the finale
finesse- N  skill in handling a difficult or highly sensitive situation; adroit and artful management: exceptional diplomatic finesse. She managed that situation with great finesse. 
finicky -Adj too much concerned with detail She is a very finicky person. 
fussy - ADj overcrowded or cluttered with detail; "a busy painting"; "a fussy design" too concerned with details; too particular; difficult to satisfy She is very fussy about her food. 
finite - Adj Having bounds; limited: a finite list of choices; our finite fossil fuel reserves.
fissure - a long narrow depression in a surface
fitful - Adj occurring in spells and often abruptly; "fitful bursts of energy"; "spasmodic rifle fire"
fit Vto prepare: This school fits students for college. to put with precise placement or adjustment: He fitted the picture into the frame.
flaccid - lacking in strength or firmness or resilience; "flaccid muscles"; "took his lax hand in hers"; "gave a limp handshake"; "a limp gesture as if waving away all desire to know" G.K.Chesterton; "a slack grip"
flag - يَتْعَب، يُصاب بالوَهَنTo decline in vigor or strength: The conversation flagged. Halfway through the race he began to flag. 
flagrant - Adj  shockingly noticeable or evident; obvious; glaring: a flagrant error.  notorious; scandalous: a flagrant crime; a flagrant offender. flagrant injustice conspicuously and outrageously bad or reprehensible; "a crying shame"; "an egregious lie"; "flagrant violation of human rights"; "a glaring error"; "gross ineptitude"; "gross injustice"; "rank treachery
flair -مَيْل طبيعي، نَزْعَه N a natural talent, aptitude, or ability; bent; knack: a flair for writing rhymes.smartness of style, manner, etc.: Their window display has absolutely no flair at all. a natural ability or cleverness for (doing) something She has flair for (learning) languages
flamboyant -Adj مُبُهْرَج، زاهٍ، لافِت للإنتِباه elaborately or excessively ornamented; "flamboyant handwriting"; "the senator's florid speech"strikingly bold or brilliant; showy: flamboyant colors. intended to attract notice flamboyant clothes 
flaunt - N V he act of displaying something ostentatiously; "his behavior was an outrageous flaunt" To exhibit ostentatiously or shamelessly: flaunts his knowledge.to show off in order to attract attention to oneself She flaunted her expensive clothes. 
flay - V  strip the skin off
fleck - a speck; a small bit: a fleck of dirt.a spot or small patch of color, light, etc.: the dapple mare with flecks of gray. A tiny mark or spot: flecks of mica in the rock. 
fledgeling - any new participant in some activity
fledge -V  grow feathers; "The young sparrows are fledging already"
flicker -V   to burn unsteadily; shine with a wavering light: The candle flickered in the wind and went out. to move to and fro; vibrate; quiver: The long grasses flickered in the wind. 
flutter - V Nto wave, flap, or toss about: Banners fluttered in the breeze. 
flinch -  N V a reflex response to sudden pain to make a sudden movement back or away in fear, pain etc He flinched away from the sudden heat. 
flippant - ADj frivolously disrespectful, shallow, or lacking in seriousness; characterized by levity: The audience was shocked by his flippant remarks about patriotism. 
flip - يَقْلِب an acrobatic feat in which the feet roll over the head (either forward or backward) and return to toss or put in motion with a sudden impulse, as with a snap of a finger and thumb, esp. so as to cause to turn over in the air: to flip a coin. sometimes with over) to turn over quickly She flipped over the pages of the book. 
flit to move lightly and swiftly; fly, dart, or skim along: bees flitting from flower to flower
floe - a flat mass of ice (smaller than an ice field) floating at sea
flora - Nthe plants of a district or country as a whole the flora and fauna of Borneo 
. florid - elaborately or excessively ornamented; "flamboyant handwriting"; "the senator's florid speech"
aureate, flamboyant, showy
fancy -ADj  not plain; decorative or ornamented; "fancy handwriting"; "fancy clothes"  reddish; ruddy; rosy: a florid complexion.
flush - V Na blush; rosy glow: a flush of embarrassment on his face. to redden; cause to blush or glow: Winter air flushed the children's cheeks.
flowery -AD jFull of ornate or grandiloquent expressions; highly embellished: a flowery speech. 
flotsam - the floating wreckage of a ship
flounder -Vto struggle with stumbling or plunging movements (usually fol. by about, along, on, through, etc.): He saw the child floundering about in the water.   to struggle clumsily or helplessly: He floundered helplessly on the first day of his new job. 
flourish -Vيَزْدَهِر، يَنموto be in a vigorous state; thrive: a period in which art flourished.  To grow well or luxuriantly; thrive: The crops flourished in the rich soil. My plants are flourishing.
flout -to refuse to respect or obey He flouted the headmaster's authority. treat with contemptuous disregard; "flout the rules"
fluctuate -to change continually; shift back and forth; vary irregularly: The price of gold fluctuated wildly last month.  move or sway in a rising and falling or wavelike pattern; "the line on the monitor vacillated"
fluent -ADj (of a language etc) smoothly and skilfully spoken He spoke fluent French.(of a person) able to express oneself easily He is fluent in English. 
fluke -a chance success Passing the exam was a fluke — I had done no work.
fluster -N V excitement and confusion caused by hurryShe was in a terrible fluster when unexpected guests arrived. to cause to be worried or nervous; to agitateDon't fluster me! 
flux -

fodder - coarse food (especially for cattle and horses) composed of entire plants or the leaves and stalks of a cereal crop
foil - to prevent the success of; frustrate; balk: She was foiled in her attempt to become President.  Loyal troops foiled his attempt to overthrow the government.  metal in the form of very thin sheets: aluminum foil. silver foil 
foist -to force upon or impose fraudulently or unjustifiably (usually fol. by on or upon): to foist inferior merchandise on a customer.  to force onto another; "He foisted his work on me"
foliage - n leaves  This plant has dark foliage
foment -V to instigate or foster (discord, rebellion, etc.); promote the growth or development of: to foment trouble; to foment discontent.  to apply warm water or medicated liquid, ointments, etc., to (the surface of the body). 
foolhardy - reckless, rashADj  marked by unthinking boldness; with defiant disregard for danger or consequences; "foolhardy enough to try to seize the gun from the hijacker"; "became the fiercest and most reckless of partisans"-Macaulay; "a reckless driver"; "a rash attempt to climb the World Trade Center" He made a foolhardy attempt to climb the mountain in winter. 
fop - a man who is much concerned with his dress and appearance
foray -a quick raid, usually for the purpose of taking plunder: Vikings made a foray on the port. a quick, sudden attack: The defenders made a foray outside the walls. 
forbearance -N  patience; control of temper She showed great forbearance. 
ford - cross a river where it's shallow
forebears - N ancestors  My forebears lived in that castle. 
forebode -to foretell or predict; be an omen of; indicate beforehand; portend: clouds that forebode a storm. 
foreboding  نذير الشؤم -تَشاؤُم ، تَطَيُّر، إحساس بأن شرّا سوف يَحْدُث  a feeling of evil to come; "a steadily escalating sense of foreboding"; "the lawyer had a presentiment that the judge would dismiss the case" a feeling that something bad is going to happen He has a strange foreboding that he will die young
forensic -used of legal argumentation
forum - a public meeting or assembly for open discussion
foreshadow -to show or indicate beforehand; prefigure: Political upheavals foreshadowed war. 
forerunner - N Penicillin was the forerunner of modern antibiotics. 
foresight - N the ability to see in advance what may happen and to plan for it She had the foresight to drive carefully in case the roads were icy.
forestall -to prevent, hinder, or thwart by action in advance: to forestall a riot by deploying police. 
forfeit - N V-something that must be given up because one has done something wrong, especially in games If you lose the game you will have to pay a forfeit.to lose (something) because one has done something wrong He forfeited our respect by telling lies forfeited: His former rights are forfeit now. 
forge ---- -
forlorn - ADj bereft; destitute: forlorn of comfort. pitiful; unhappy because left alone She seems rather forlorn since he left
formality - something which is done for appearance but has little meaning The chairman's speech was only a formality.  unrelaxed correctness of behaviour His formality made him appear unfriendly. 
formidable -  صَعْبمُخيف، رَهيب، مُريعADj causing fear, apprehension, or dread: a formidable opponent. of discouraging or awesome strength, size, difficulty, etc.; intimidating: a formidable problem. Arousing fear, dread, or alarm: the formidable prospect of major surgery. rather frightening a formidable appearance very difficult to overcome formidable difficulties 
forsake - V  يَهْجُر، يَتَخَلّى عن to quit or leave entirely; abandon; desert: She has forsaken her country for an island in the South Pacific.  leave someone who needs or counts on you; leave in the lurch; "The mother deserted her children"to leave alone; to abandon He was forsaken by his friends. 
forswear -V يَترُك، يَنْبُذ، يُقْسِم أن يَتْرُكto reject or renounce under oath: to forswear an injurious habit. 
forte - N  a strong point, as of a person; that in which one excels: I don't know what her forte is, but it's not music. 
forthright -  مُستَقيم وَشريف ADjgoing straight to the point; frank; direct; outspoken: It's sometimes difficult to be forthright and not give offense  honest and straightforward He is a very forthright young man.characterized by directness in manner or speech; without subtlety or evasion; "blunt talking and straight shooting"; "a blunt New England farmer"; "I gave them my candid opinion"; "forthright criticism"; "a forthright approach to the problem"; "tell me what you think--and you may just as well be frank"; "it is possible to be outspoken without being rude"; "plainspoken and to the point"; "a point-blank accusation"
forthcoming - available when required or as promised; "federal funds were not forthcoming" He assured us that payment would be forthcoming. coming forth, or about to come forth; about to appear; approaching in time: the forthcoming concert.  happening or appearing soon   forthcoming events
fortitude -N  mental and emotional strength in facing difficulty, adversity, danger, or temptation courageously: Never once did her fortitude waver during that long illness. He showed great fortitude during his long illness
fortuitous - ADj happening or produced by chance; accidental: a fortuitous encounter.lucky; fortunate: a series of fortuitous events that advanced her career  having no cause or apparent cause; "a causeless miracle"; "fortuitous encounters--strange accidents of fortune"; "we cannot regard artistic invention as...uncaused and unrelated to the times"
foster -to promote the growth or development of; further; encourage: to foster new ideas.She fostered the child's talents.  to look after for a period of time; to bring up a child that is not one's own She fostered the children for several months. 
founder - fail utterly; collapse; "The project foundered"break down, literally or metaphorically; "The wall collapsed"; "The business collapsed"; "The dam broke"; "The roof collapsed"; "The wall gave in"; "The roof finally gave under the weight of the ice"
fracas - noisy quarrel
fractious - stubbornly resistant to authority or control; "a fractious animal that would not submit to the harness"; "a refractory child"
frail - SYN ADj SYNO having delicate health; not robust; weak: My grandfather is rather frail now. a frail old lady 
franchise -  privilege of a public nature conferred on an individual, group, or company by a government: a franchise to operate a bus system. 
frantic - excessively agitated; transported with rage or other violent emotion; "frantic with anger and frustration"; "frenetic screams followed the accident"; "a frenzied look in his eye"The frantic mother searched for her child
frank -candid, forthright, free-spoken, point-blank, straight-from-the-shoulder, outspoken, plainspoken, blunt  ADj direct and unreserved in speech; straightforward; sincere: Her criticism of my work was frank but absolutely fair. without inhibition or subterfuge; direct; undisguised: a frank appeal for financial aid.  characterized by directness in manner or speech; without subtlety or evasion; "blunt talking and straight shooting"; "a blunt New England farmer"; "I gave them my candid opinion"; "forthright criticism"; "a forthright approach to the problem"; "tell me what you think--and you may just as well be frank"; "it is possible to be outspoken without being rude"; "plainspoken and to the point"; "a point-blank accusation"
fraudulent - characterized by, involving, or proceeding from fraud, as actions, enterprise, methods, or gains: a fraudulent scheme to evade taxes. intended to deceive; "deceitful advertising"; "fallacious testimony"; "smooth, shining, and deceitful as thin ice" - S.T.Coleridge; "a fraudulent scheme to escape paying taxes"
fraud -(an act of) dishonesty He was sent to prison for fraud. 
fraught - marked by distress; "a fraught mother-daughter relationship" Filled with a specified element or elements; charged: an incident fraught with danger; an evening fraught with high drama
frenetic -frantic, phrenetic, frenzied  excessively agitated; transported with rage or other violent emotion; "frantic with anger and frustration"; "frenetic screams followed the accident"; "a frenzied look in his eye"
frenzied
fresco التصوير الجصّي a picture painted on a wall while the plaster is still wet
fret -to feel or express worry, annoyance, discontent, or the like: Fretting about the lost ring isn't going to help.  agitation resulting from active worry; "don't get in a stew"; "he's in a sweat about exams"to worry or show anxiety or discontentment She was always fretting about something or other
firction -N  the rubbing together of two things The friction between the head of the match and the matchbox causes a spark. quarrelling; disagreement  There seems to be some friction between the workmen and the manager. 
frigid -ADj very cold in temperature: a frigid climate. without warmth of feeling; without ardor or enthusiasm: a frigid reaction to the suggested law.  sexually unresponsive; "was cold to his advances"; "a frigid woman"
fritter -to squander or disperse piecemeal; waste little by little (usually fol. by away): to fritter away one's money; to fritter away an afternoon. spend frivolously and unwisely; "Fritter away one's inheritance"
frivolous - غَيْر جَدّي، طائِش ADj characterized by lack of seriousness or sense: frivolous conduct.  not serious in content or attitude or behavior; "a frivolous novel"; "a frivolous remark"; "a frivolous young woman"not serious; playful He wasted his time on frivolous pleasures
frolicsome -ADj  given to merry frolicking; "frolicsome students celebrated their graduation with parties and practical jokes
frolic - gay or light-hearted recreational activity for diversion or amusement; "it was all done in play"; "their frolic in the surf threatened to become ugly (of children, young animals etc) to play happily The puppies frolicked in the garden
frond سعفة النخل 
fructify - become productive or fruitful; "The seeds fructified to bear fruit; become fruitful: With careful tending the plant will fructify. 
frugality - prudence in avoiding waste
frugal - ADjavoiding waste; "an economical meal"; "an economical shopper"; "a frugal farmer"; "a frugal lunch"; "a sparing father and a spending son"; "sparing in their use of heat and light"; "stinting in bestowing gifts"; "thrifty because they remember the great Depression"; "`scotch' is used only informally"economical in use or expenditure; prudently saving or sparing; not wasteful: a frugal manager. 
fruition -Nattainment of anything desired; realization; accomplishment: After years of hard work she finally brought her idea to full fruition. an actual result; the happening of something that was thought of, hoped for etc Her dreams came to fruition. 
frustrate - V hinder or prevent (the efforts, plans, or desires) of; "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"to make (plans, efforts, etc.) worthless or of no avail; defeat; nullify: The student's indifference frustrated the teacher's efforts to help him. to disappoint or thwart (a person): a talented woman whom life had frustrated. to make useless His efforts were frustrated
fugitive -N ADJ  a person who is fleeing, from prosecution, intolerable circumstances, etc.; a runaway: a fugitive from justice; a fugitive from a dictatorial regime. fleeting; transitory; elusive: fugitive thoughts that could not be formulated. 
fulcrum -the support, or point of rest, on which a lever turns in moving a body. 
fulminate - rail  V criticize severely; "He fulminated against the Republicans' plan to cut Medicare"; "She railed against the bad social policies"to issue denunciations or the like (usually fol. by against): The minister fulminated against legalized vice. 
fulsome -offensive to good taste, esp. as being excessive; overdone or gross: fulsome praise that embarrassed her deeply; fulsome décor.  disgusting; sickening; repulsive: a table heaped with fulsome mounds of greasy foods. excessively or insincerely lavish: fulsome admiration.encompassing all aspects; comprehensive: a fulsome survey of the political situation in Central America. unpleasantly and excessively suave or ingratiating in manner or speech; "buttery praise"; "gave him a fulsome introduction"; "an oily sycophantic press agent"; "oleaginous hypocrisy"; "smarmy self-importance"; "the unctuous Uriah Heep"
fumble -to feel or grope about clumsily: She fumbled in her purse for the keys. to make, handle, etc., clumsily or inefficiently: to fumble an attempt; He fumbled his way through the crowded room. 
functionary - a worker who holds or is invested with an office
functional -designed to be useful rather than to look beautiful functional clothes; a functional building  designed for or capable of a particular function or use; "a style of writing in which every word is functional"; "functional architecture"able to operate It's an old car, but it's still functional. 
fundamental -of great importance; essential; basic Respect for law and order is fundamental to a peaceful society. a basic or essential part of any thingLearning to read is one of the fundamentals of education serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"being or involving basic facts or principles; "the fundamental laws of the universe"; "a fundamental incompatibility between them"; "these rudimentary truths"; "underlying principles"serving as, or being an essential part of, a foundation or basis; basic; underlying: fundamental principles; the fundamental structure. 
funereal - ADj mournful; gloomy; dismal: a funereal aloofness that was quite chilling. mournful; suitable for a funeral to speak in funereal tones 
furious -ADj very angry She was furious with him about it.full of fury, violent passion, or rage; extremely angry; enraged: He was furious about the accident. 
furtive -taken, done, used, etc., surreptitiously or by stealth; secret: a furtive glance.    marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a lurking prowler"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"; "someone skulking in the shadows"
furtively ADv - in a furtive manner; "the soldiers were furtively crawling through the night
fusillade - rapid simultaneous discharge of firearms; "our fusillade from the left flank caught them by surprise"
fusion -the act of melting together fusion of the metal pieces  a very close joining of things the fusion of his ideas
futile - ADj incapable of producing any result; ineffective; useless; not successful: Attempting to force-feed the sick horse was futile.  producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt" a futile attempt 

Synonyms 1. unstable, unsteady, variable, capricious, fitful. 2. inconstant. 1, 2. Fickle, inconstant, capricious, vacillating describe persons or things that are not firm or steady in affection, behavior, opinion, or loyalty. Fickle implies an underlying perversity as a cause for the lack of stability: the fickle seasons, disappointing as often as they delight; once lionized, now rejected by a fickle public. Inconstant suggests an innate disposition to change: an inconstant lover, flitting from affair to affair. Capricious implies unpredictable changeability arising from sudden whim: a capricious administration constantly and inexplicably changing its signals; a capricious and astounding reversal of position. Vacillating means changeable due to lack of resolution or firmness: an indecisive, vacillating leader, apparently incapable of a sustained course of action.
Synonyms: flagrant, glaring, gross, egregious, rank2
These adjectives refer to what is conspicuously bad or offensive. Flagrant applies to what is so offensive that it cannot escape notice: flagrant disregard for the law.
What is glaring is blatantly and painfully manifest: a glaring error; glaring contradictions.
Gross suggests a magnitude of offense or failing that cannot be condoned or forgiven: gross ineptitude; gross injustice.
What is egregious is outrageously bad: an egregious lie.
Rank implies that the term it qualifies is as indicated to an extreme, violent, or gross degree: rank stupidity; rank treachery
Synonyms 1, 2. feeble; breakable, frangible. Frail, brittle, fragile imply a delicacy or weakness of substance or construction. Frail applies particularly to health and immaterial things: a frail constitution; frail hopes. Brittle implies a hard material that snaps or breaks to pieces easily: brittle as glass. Fragile implies that the object must be handled carefully to avoid breakage or damage: fragile bric-a-brac.