孳衍 zīyǎn to multiply Origin Definitions Defs Strokes Stroke Words Sentences Sents 孳 zī to propagate; to mate (bound form) to reproduce; to multiply; to breed; to mate (of animals)衍 yǎn noun to spread out (bound form) to spread out; to develop; to multiply or proliferate, as in 繁衍 fányǎn