一石二鸟 yīshí'èrniǎo to kill two birds with one stone Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral one one; the number 1; single; alone石 shí noun stone rock; stone; (bound form) made of stone; rock-like二 èr numeral two the number two; 2鸟 鳥 niǎo noun bird bird; feathered vertebrate with wings and a beak