GRE Words Starting with O (45 words)

obsequious

obedient or attentive to an excessive or servile degree.

She's constantly followed by obsequious assistants who will do anything she tells them to.

obsolete

no longer produced or used; out of date.

The word 'obsolete' is commonly used in GRE vocabulary.

opaque

An area of darkness; a place or region with no light.

opaque glass

obviate

To anticipate and prevent or bypass (something which would otherwise have been necessary or required).

The new medical treatment obviates the need for surgery.

omnipresent

widely or constantly encountered; widespread.

the museum's omnipresent security apparatus

oust

drive out or expel (someone) from a position or place.

The rebels ousted the dictator from power.

outstrip

move faster than and overtake (someone else).

Their achievements far outstrip [= excel , surpass ] our own.

obeisance

a gesture expressing deferential respect, such as a bow or curtsy.

After making his obeisances he approached the altar.

ostentatious

characterized by pretentious or showy display; designed to impress.

an ostentatious display of wealth/knowledge

onerous

(of a task or responsibility) involving a great deal of effort, trouble, or difficulty.

an onerous task

opprobrium

harsh criticism or censure.

They're going ahead with the plan despite public opprobrium .

obscure

To render obscure; to darken; to make dim; to keep in the dark; to hide; to make less visible, intelligible, legible, glorious, beautiful, or illustrious.

The word 'obscure' is commonly used in GRE vocabulary.

overt

done or shown openly; plainly apparent.

overt hostility

obstinate

stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so.

obstinate resistance to change

oblivious

not aware of or concerned about what is happening around one.

We called out to them, but they remained oblivious . [=they did not notice us]

officious

assertive of authority in a domineering way, especially with regard to trivial matters.

officious people who are always ready to offer unasked advice

object

A thing that has physical existence.

The word 'object' is commonly used in GRE vocabulary.

ominous

giving the worrying impression that something bad is going to happen; threateningly inauspicious.

The word 'ominous' is commonly used in GRE vocabulary.

outlandish

looking or sounding bizarre or unfamiliar.

The word 'outlandish' is commonly used in GRE vocabulary.

obstreperous

noisy and difficult to control.

the boy is cocky and obstreperous

odious

extremely unpleasant; repulsive.

Scrubbing the toilet is an odious task.

obdurate

stubbornly refusing to change one's opinion or course of action.

I argued this point with him, but he was obdurate

obfuscate

to confuse

occlude

to block

Writers often employ 'occlude' to convey to block.

ornate

elaborate

offhand

Without preparation or forethought

She gave an offhand speech.

opaqueness

dullness/not allowing light to pass through

odor

smell

ossified

turned to bone; hardened like bone; Inflexible

ostracism

shut out from society refuse to meet talk

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