Credulous (adj): eager to believe; gullible

Judy was so credulous that she simply nodded happily when Kiran told her he could teach her how to fly.

 

Criterion (n) standard; basis for judgment

In choosing among the linemen, the most important criterion was quickness.

 

Cryptic ( adj) mysterious; mystifying

His remarks were cryptic.

Culinary (adj): relating to cooking or the kitchen

A cooking school is sometimes called a culinary institute.

Culminate (v) to climax; to reach full effect

The masquerade ball was the culmination of our fund-raising efforts.

Culpable (adj): deserving blame, guilty

We all felt culpable when the homeless old man died in the doorway of our apartment building.

Exculpate : not guilty

Cursory (adj): hasty; superficial

To make a cursory attempt at learning.

Curtail (v): to shorten; to cut short

The vet curtailed her effort to cut the cat’s tail with the lawn mower.

Cynic (N):  one who deeply distrusts human nature; one who believes humans are motivated only by selfishness

Cynical (adj): suspicious, dubious, skeptical 

Corollary (N): something that follows; a natural consequence

 A corollary is a law that can be deduced without further proof from law that has already been proven.

 

Corroborate (v): to confirm; to back up with evidence

The police could find no evidence of theft and thus could not corroborate Mike’s claim that he had been robbed.

Cosmopolitan (adj) at home in many places or situations; internationally sophisticated.

New York is a cosmopolitan city; you can hear nearly every language spoken there.

Countenance (n) face; facial expression; especially an encouraging one.

 

Coup (n): a brilliant victory or accomplishment; the violent overthrow of a government by a small internal group.

 

Covenant (n): a solemn agreement; a contract; a pledge

The indigenous tribes made a covenant not to fight each other anymore.

Covert (adj) secret; hidden

Covert activities are secret activities

Covet (V): to wish for enviously

To covet thy neighour’s wife is to want thy neighbor’s wife for thyself