绞尽脑汁 jiǎo jìn nǎo zhī

DEFINITIONS

  1. to rack one's brains

CHARACTERS

绞 jiǎo twist, wring; intertwine; winch
尽 jìn
HSK 4
exhaust, use up; deplete
脑 nǎo
HSK 1
brain
汁 zhī
HSK 4
juice, liquor, fluid, sap, gravy, sauce