| yǎn | to spread out/to develop/to overflow/to amplify |
| 衍 | to spread out to develop to overflow |
| 衍化 | to evolve (of ideas, designs, constructions etc) to develop and change |
| 衍变 | to develop to evolve |
| 衍圣公 | hereditary title bestowed on Confucius' descendants |
| 衍圣公府 | the official residence of Confucius' descendants at Qufu 曲阜, Shandong |
| 衍射 | diffraction |
| 衍射光栅 | diffraction grating; grating |
| 衍射格子 | diffraction grating (physics) |
| 衍射角 | angle of diffraction (physics) |
| 衍文 | redundancy due to misprinting |
| 衍沃之区 | a rich and fertile region |
| 衍溢四海 | overflowing to the four seas |
| 衍生 | to give rise to to derive derivative |
| 衍生产品 | derivative product derivative (in finance) |
| 衍生字 | [Grammar] derivative |
| 衍生物 | a derivative (complex product derived from simpler source material) |
| 衍生的 | descendable; deuterogenic |