絞盡腦汁 jiǎo jìn nǎo zhī

DEFINITIONS

  1. to rack one's brains

CHARACTERS

絞 jiǎo twist, wring; intertwine; winch
盡 jìn exhaust, use up; deplete
腦 nǎo brain
汁 zhī juice, liquor, fluid, sap, gravy, sauce