noun
dungeon
DUHN-juhn/ˈdʌndʒən/
A dark enclosed underground prison.
Short steps lead down to a stone dungeon with a barred door.

Etymology
A donjon was a castle’s great tower or keep. In English, the name shifted from this stronghold to a strong cell within it, producing the sense of an underground prison.
In context
a dimly lit dungeon where iron maidens and racks loom ominously.
More examples
- The guards locked the captured spy in the dungeon.
- Visitors descend into the castle's dark dungeon.
- The captives escaped from their underground dungeons through a narrow tunnel.
Forms
dungeon · dungeons