| 快感中心 | kuai4 gan3 zhong1 xin1 | pleasure center |
| 快捷准时 | kuai4 jie2 zhun3 shi2 | speed and punctuality |
| 快板儿 | kuai4 ban3 er5 | clapper talk |
| 快棋赛 | kuai4 qi2 sai4 | blitz chess tournament |
| 快步流星 | kuai4 bu4 liu2 xing1 | to walk quickly |
| 快活的 | kuai4 huo2 de5 | peart |
| 快行道 | kuai4 xing2 dao4 | fast lane |
| 快递信封 | kuai4 di4 xin4 feng1 | courier envelope |
| 快递员 | kuai4 di4 yuan2 | courier |
| 快速上升 | kuai4 su4 shang4 sheng1 | to grow very quickly |
| 快速提高 | kuai4 su4 ti2 gao1 | to rise rapidly |
| 快速检验法 | kuai4 su4 jian3 yan4 fa3 | high-speed inspection and testing law |
| 快速的 | kuai4 su4 de5 | allegro |