| HSK | Not in HSK |
|---|---|
| FREQUENCY | Unknown |
| 密 mì | dense, thick, close; intimate |
| 闭 bì | shut, close; obstruct, block up |
| 式 shì | style, system, formula, rule |
| 循 xún | obey, comply with, follow |
| 环 huán | jade ring or bracelet; ring |
| 再 zài | again, twice, re- |
| 呼 hū | breathe sigh, exhale; call, shout |
| 吸 xī | inhale, suck in; absorb; attract |
| 水 shuǐ | water, liquid, lotion, juice |
| 肺 fèi | lungs |
| 系 xì | system; line, link, connection |
| 统 tǒng | govern, command, control; unite |