at wits' end

at (one's) wits' end

At the limit of one's mental resources; utterly at a loss.

Name	Pronounced	Usage
Hewitt	['hju:it]
Clive	KLIEV	English
Almeric	[æl'merik]
Dakarai	-	Southern African, Shona
Angelo	AHN-je-lo	Italian
Souma	so:-mah	Japanese