Here are some of the common English gre words to see the whole list
( letter O ) see the file
the of the common English gre wrods are on the left check the rest of the bottoms
obdurate - stubbornly persistent in wrongdoing
obeisance انحناءة احترام - bending the head or body or knee as a sign of reverence or submission or shame
obese - corpulent,excessively fat ;
obfuscate -To make so confused or opaque as to be difficult to perceive or understand: "A great effort was made . . . to obscure or obfuscate the truth" to obfuscate a problem with extraneous information .