To imprison in a dungeon.
A room dedicated to sadomasochistic sexual activity.
An area inhabited by enemies, containing story objectives, treasure and bosses.
An underground prison or vault, typically built underneath a castle.
To compel (someone) into a forced labour camp or a similar place of confinement or exile.
A prison camp, especially one used to hold political prisoners.
Also GULAG: the system of all Soviet labour camps and prisons in use, especially during the Stalinist period (1930s–1950s).
A place where, or political system in which, people with dissident views are routinely oppressed.