| 交流HSK 4 | jiāo liú | to exchange; exchange; communication; interaction; to have social contact (with sb) | |
| 流动 | liú dòng | to flow; to circulate; to go from place to place; to be mobile; (of assets) liquid | |
| 流行HSK 4 | liú xíng | (of a contagious disease etc) to spread; to propagate; (of a style of clothing, song etc) popular; fashionable | |
| 流通HSK 6 | liú tōng | to circulate; to distribute; circulation; distribution | |
| 流域 | liú yù | river basin; valley; drainage area |
| 1 | This river is very long. | |
| 2 | She speaks fluent French. | |
| 3 | I like listening to popular music. | |
| 4 | Her English is very fluent. | |
| 5 | Communication within and outside the company is not smooth. |