費盡心思 fèi jìn xīn si

DEFINITIONS

  1. to rack one's brains (idiom); to take great pains to think sth through

CHARACTERS

費 fèi expenses, expenditures, fee
盡 jìn exhaust, use up; deplete
心 xīn
HSK 3
heart; mind, intelligence; soul
思 si
HSK 2
think, consider, ponder; final particle