dungeon

noun

1. An underground prison or vault, typically built underneath a castle.

   “Year after year he lay patiently in a dungeon.”

2. The low area between two drumlins.
3. (obsolete)The main tower of a motte or castle; a keep or donjon.
4. (obsolete)A shrewd person.
5. An area inhabited by enemies, containing story objectives, treasure, and bosses.
6. A room dedicated to sadomasochistic sexual activity.

verb

1. (transitive)To imprison in a dungeon.

   “Of every act of severity, of every bold violation of the constitution, of every bill for dungeoning and gagging the people, of every tax, of every loan, of all that set frugality at defiance, and that mocked at mercy, these men had been either the authors or the most strenuous supporters […]”