| 牢固HSK 6 | láo gù | firm; secure | |
| 牢记 | láo jì | to keep in mind; to remember | |
| 牢骚HSK 6 | láo sāo | discontent; complaint; to complain | |
| 坐牢 | zuò láo | to be imprisoned | |
| 牢房 | láo fáng | jail cell; prison cell |
| 1 | He lay in bed grousing all day. | |
| 2 | This type of glue dries quickly and sticks very firmly. | |
| 3 | Their friendship is so strong that it will never break in their lifetime. | |
| 4 | This garment was not well dyed and faded after only a few wears. | |
| 5 | This tape is very sticky and can adhere firmly to any material. |