wit
/wɪt/noun
Definitions
(now usually in the plural) Sanity.
Example: He's gone completely out of his wits.
(obsolete usually in the plural) The senses.
Intellectual ability; faculty of thinking, reasoning.
Example: Where she has gone to is beyond the wit of man to say.
The ability to think quickly; mental cleverness, especially under short time constraints.
Example: My father had a quick wit and a steady hand.