| huán | bracelet/ring (not for finger)/to surround/to loop/loop |
| 环 | surname Huan |
| 环丙烷 | cyclopropane; trimethylene |
| 环保 | environmental protection environmentally friendly |
| 环保主义 | environmentalism |
| 环保主义者 | environmentalist |
| 环保产业 | enviromental protection industry |
| 环保团体 | environmental groups |
| 环保型 | environmental environmentally friendly |
| 环保局 | environment protection office PRC National bureau of environmental protection |
| 环保意识 | environmental consciousness |
| 环保斗士 | an environmental activist a fighter for environmental protection |
| 环保科 | an environmental protection section |
| 环保科学 | environmental science |
| 环化 | to cyclize cyclization (chemistry) |
| 环化酵素 | [Chemistry] cyclase |
| 环化酶 | cyclase |
| 环卫 | sanitation; imperial guards |
| 环县 | Huan county in Qingyang 慶陽|庆阳 |
| 环围 | surrounded |
| 环型拓扑结构 | [Computer] ring topology |