劳心苦思 láo xīn kǔ sī

DEFINITIONS

  1. to rack one's brains
  2. to think hard

CHARACTERS

劳 láo
HSK 5
labor, toil, do manual work
心 xīn
HSK 3
heart; mind, intelligence; soul
苦 kǔ
HSK 4
bitter; hardship, suffering
思 sī
HSK 2
think, consider, ponder; final particle