- 牢
- den
- 牢
- shed
- 牢房
- cell
- 牢房
- ward
- 单人牢房
- single cell
- 牢固
- firm
- 牢固
- secure
- 牢记
- keep in mind
- 牢记在心
- keep [or bear] firmly in mind
- 牢记在心
- be imprinted on one's mind
- 牢靠
- reliable
- 牢靠
- dependable
- 牢笼
- cage
- 牢笼
- bonds
- 封建思想的牢笼
- bonds of feudal ideas
- 牢笼
- trap
- 堕入牢笼
- fall into a trap
- 堕入牢笼
- be entrapped
- 牢骚
- complaint
- 牢骚
- grievance
- 发牢骚
- complain
- 发牢骚
- make a complaint
- 牢骚
- grumble
- 牢骚
- complain
- 牢狱
- prison
- 牢狱
- jail
- 牢狱
- gaol
- 囚牢
- prison
- 囚牢
- jail
- 囚牢
- gaol
- 囚牢
- dungeon
- 坐牢
- be in jail
- 坐牢
- be imprisoned
- 亡羊补牢
- mend the fold after a sheep is lost.
- 亡羊补牢,犹未为晚。
- Better late than never.