殚精竭虑

dān jīng jié lǜ

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Definitions

  1. 1. to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly
  2. 2. to rack one's brains
  3. 3. to leave no stone unturned

Child Words of 殚精竭虑

精
jīng

essence

虑
lǜ

to think over

殚
dān

entirely

竭
jié

to exhaust