伺机而动 sìjī'érdòng to bide one's time Origin Definitions Defs Strokes Stroke Words Sentences Sents 伺机 伺機 sìjī to wait for a chance to watch for or await an opportunity; to bide one's time而 ér particleconjunction [adverbial linker] Connects an adverb-like description to the following verb to show the manner, cause, or basis of an action.动 動 dòng verb to act To take action; to start doing something or get moving.