wit

The natural ability to perceive and understand; intelligence.

Practical intelligence; shrewdness or resourcefulness.

Sound mental faculties; sanity.

The ability to express oneself intelligently in a playful or humorous manner, often in overturning audience expectations.

A person noted for this ability, especially in conversation.

Intelligent playfulness or humor in expression, as in speech, writing, or art.

A person of exceptional intelligence.

(at (one’s) wits’ end) At the limit of one’s mental resources; utterly at a loss.