| 丝光 | si1 guang1 | mercerizing |
| 菌丝 | jun1 si1 | hypha |
| 金丝 | jin1 si1 | |
| 蚕丝 | can2 si1 | natural silk (secreted by silkworm) |
| 丝绒 | si1 rong2 | velvet |
| 丝线 | si1 xian4 | thread |
| 铁丝网 | tie3 si1 wang3 | chain-link fence |
| 丝路 | si1 lu4 | silk road |
| 灯丝 | deng1 si1 | filament (in a lightbulb) |
| 保险丝 | bao3 xian3 si1 | (electrical) fuse |
| 丝胶 | si1 jiao1 | sericin |
| 一丝不苟 | yi1 si1 bu4 gou3 | meticulous |
| 人造丝 | ren2 zao4 si1 | rayon |