囹圄

例句：

1. 1.The prisoner was sentenced to lifeimprisonment for his crimes.
   这名囚犯因他的罪行被判终身监禁。
2. 2. Theprison guards were very strict in their duties.
   监狱警卫们非常严格地履行他们的职责。
3. 3. The prisoner expressed his hope thathe would be released soon.
   这名囚犯表达了他希望很快就能被释放的希望。