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obeisance (n) : a gesture showing honor or respect
obfuscation (n) : something that causes confusion, unclear
oblique (adj) : indirect or not straightforward
obstreperous (adj) : noisy, unruly, or hard to control
obtuse (adj) : lacking in insight or intellect, or slow to comprehend; it also means not sharp or pointed
officious (adj) : overly eager to serve or to advise, usually in a bossy way
ominous (adj) : threatening or suggesting something bad is on the way
operetta (n) : a light, amusing opera with spoken dialogue
opus (n) : a musical composition or literary work
oracular (adj) : being like an oracle, offering wisdom that seems to come from god
oratory (n) : ability to speak well in public
ordinate (adj) : the arrangement of things in regular rows
ornate (adj) : beautifully detailed, showy or decorated
ornithologist (n) : a scientist who studies birds
ovation (n) : a long round of applause, lengthy cheers
overt (adj) : clearly evident or obvious
overwrought (adj) : overworked or fatigued; it can also mean very nervous or excited
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
GRE and SAT Vocabulary Words