殫精竭慮

dānjīngjiélǜ

tax one's ingenuity; rack (or cudgel) one's brains

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dān jīng jié lǜ

v. tax one's ingenuity, rack one's brains, cudgel one's brains

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dan1 jing1 jie2 lu:4

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

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殫精竭慮|殚精竭虑 [dān jīng jié lu] ► to exhaust one's thoughts and ingenuity (idiom); to think sth through thoroughly ► to rack one's brains ► to leave no stone unturned