| 迅速HSK 5 | xùn sù | rapid; speedy; fast | |
| 速度HSK 4 | sù dù | speed; rate; velocity; (music) tempo; Classifiers: 个 | |
| 快速 | kuài sù | fast; high-speed; rapid | |
| 加速 | jiā sù | to speed up; to expedite | |
| 高速公路HSK 4 | gāo sù gōng lù | expressway; highway; freeway |
| 1 | The speed of this car is fast. | |
| 2 | This player is very fast. | |
| 3 | This tram moves very quickly. | |
| 4 | He was fined for exceeding the speed limit. | |
| 5 | The printer is printing slowly. |