at wits' end

at (one's) wits' end

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

Name	Pronounced	Usage
Jerri	JER-ee	English
Lavone	-	English (Rare)
Laura	['lɔ:rə]
Kunto	-	Western African, Akan
Hall	HAWL	English
Lucanus	-	Ancient Roman