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
Charita	-	Various
Pranay	-	Indian, Hindi, Marathi
Germogen	-	Russian
SØLvi	-	Norwegian
Hanna (1)	HAHN-nah (Finnish, Polish, Ukrainian), HAH-nah (German)	Swedish, Norwegian, Danish, Finnish, Polish, Ukrainian, Belarusian, German, Dutch, Icelandic, Hungar
Zorka	-	Czech, Slovak, Croatian, Serbian, Slovene, Bulgarian, Macedonian