prison

1. Origins, structure, and basic meaning

• Structure: 獄 has 14 strokes and concerns prison or imprisonment.
• Basic usage: 監獄 is read かんごく, and 脱獄 is read だつごく.

2. Common pitfalls and similar expressions

• A facility and an escape
  • かつて監獄だった建物 is a building that used to be a prison.
  • 脱獄した means escaped from prison.