at wits' end

at (one's) wits' end

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

Name	Pronounced	Usage
Dominica	-	English (Rare), Late Roman
Umida	-	Uzbek
Saifullah	-	Arabic
Keren Happukh	-	Biblical Hebrew
Neemias	-	Biblical Latin, Biblical Greek
Charo	CHAH-ro	Spanish