三思而行 sānsī'érxíng look before you leap Origin Definitions Defs Strokes Stroke Words Sentences Sents 三思 sānsī verb to think twice to think carefully; to consider over and over again before acting而 ér particleconjunction [adverbial linker] Connects an adverb-like description to the following verb to show the manner, cause, or basis of an action.行 xíng verb to do to do; to perform; to carry out; to engage in