| 空白HSK 6 | kòng bái | blank space | |
| 空地HSK 4 | kòng dì | vacant land; open space | |
| 空隙HSK 6 | kòng xì | crack; gap between two objects; gap in time between two events | |
| 空闲HSK 5 | kòng xián | idle; free time; leisure; unused (place) | |
| 空缺 | kòng quē | vacancy |
| 空间HSK 5 | kōng jiān | space; room; (fig.) scope; leeway; (astronomy) outer space; (physics, math.) space | |
| 空气HSK 4 | kōng qì | air; atmosphere | |
| 空中 | kōng zhōng | in the sky; in the air | |
| 天空HSK 5 | tiān kōng | sky | |
| 航空HSK 6 | háng kōng | aviation |
| 1 | The rocket took off. | |
| 2 | The sky is clear and cloudless. | |
| 3 | The sky is blue. | |
| 4 | His purse is empty. | |
| 5 | The sky on the west side is very beautiful. |