| 污垢 | wū gòu | filth | |
| 蓬头垢面 | péng tóu gòu miàn | messy hair and dirty face; bad appearance | |
| 藏污纳垢 | cáng wū nà gòu | to hide dirt, to conceal corruption (idiom); to shelter evil people and accept wrongdoing; aiding and abetting wicked deeds | |
| 油垢 | yóu gòu | covered in grease | |
| 水垢 | shuǐ gòu | limescale |
| 1 | The dirt in a porcelain teacup is difficult to wipe off. | |
| 2 | A good way to clean it is to rub it with gauze and toothpaste until the dirt is easily removed. | |
| 3 | There are many tartar control toothpastes on the market, most of which contain fluoride. | |
| 4 | Bombed during the war and now condemned, one of Saddam Hussein's palaces lies in ruins. | |
| 5 | Even so on the lonely shore the madman with dusty tawny locks still roamed in search of the touchstone. |