rack brains

rack your brains

also rack your brain

to try very hard to remember or think of something She racked her brains for a subject they could discuss without an argument.

/brain

To try hard to remember or think of something.

Name	Pronounced	Usage
Anantha	-	Tamil, Indian, Telugu, Kannada
Ismene	-	Greek Mythology
Itsasne	-	Basque
Khrystyna	-	Ukrainian
Harta	HAHR-tah	Indonesian
Marijse	-	Dutch