wit1
Pronunciation: /wɪt/
noun

Phrases
-
be at one's wits' end
- be overwhelmed with problems and at a loss as to what to do next: I’m almost at my wits' end trying to cope with these demands
-
be frightened (or scared) out of one's wits
- be extremely frightened.
-
gather (or collect) one's wits
- allow oneself to think calmly and clearly in a demanding situation: all she needed was a minute of two to gather her wits
-
have (or keep) one's wits about one
- be constantly alert: a signalman had to have his wits about him keep your wits about you or you’ll forget something important
-
live by one's wits
- earn money by clever and sometimes dishonest means, having no regular employment: he lived by his wits and was involved with many shady characters
-
pit one's wits against
- compete mentally with: they formed themselves into teams to pit their wits against each other

Origin:
Old English wit(t), gewit(t), denoting the mind as the seat of consciousness, of Germanic origin; related to Dutch weet and German Witz, also to wit2