非同儿戏 fēitóng'érxì no joking matter Origin Definitions Defs Strokes Stroke Words Sentences Sents 非 fēi verb not be to not be; to not belong to; equivalent to 是 shì in its negative form同 tóng adjective same same; alike; similar; equal; to be the same as儿戏 兒戲 érxì trifling matter a matter not to be taken seriously; lighthearted or careless behavior