| 封建HSK 6 | fēng jiàn | system of enfeoffment; feudalism; feudal; feudalistic | |
| 封闭HSK 6 | fēng bì | to seal; to close; to confine; to seal off; to close down; sealed; confined; closed; unreceptive | |
| 封锁HSK 6 | fēng suǒ | to blockade; to seal off | |
| 信封HSK 4 | xìn fēng | envelope; Classifiers: 个 | |
| 查封 | chá fēng | to sequester; to seize (assets); to seal up; to close down |
| 1 | I put the letter in the envelope. | |
| 2 | There is no stamp on this envelope. | |
| 3 | I have sealed the envelope already. | |
| 4 | He casually put the envelope down. | |
| 5 | He wrote me a long letter. |