三思 sānsī to think twice Origin Definitions Defs Strokes Stroke Words Sentences Sents 三思而后行 sānsī'érhòuxíng think twice before acting Think again and again before taking action; look before you leap.三思而行 sānsī'érxíng look before you leap (idiom) to think carefully before taking action; to act with caution after repeated deliberation