衍生 yǎnshēng HSK7 chemical derivative Definitions Defs Origin Strokes Stroke Words Sentences Sents 衍 yǎn noun to spread out (bound form) to spread out; to develop; to multiply or proliferate, as in 繁衍 fányǎn生 shēng verb to give rise to to give rise to; to happen; to cause; to generate
