| 残酷HSK 6 | cán kù | cruel; cruelty | |
| 冷酷HSK 6 | lěng kù | grim; unfeeling; callous | |
| 酷暑 | kù shǔ | intense heat; extremely hot weather | |
| 严酷 | yán kù | bitter; harsh; grim; ruthless; severe; cut-throat (competition) | |
| 酷爱 | kù ài | to be keen on; to have a passion for |
| 1 | I can't stand this scorching weather. | |
| 2 | I'm cool, I even like myself. | |
| 3 | Wow, the special effects in this movie are so cool. | |
| 4 | This design is really cool, I like its style. | |
| 5 | His personality is so cool, he always catches people's attention. |