dungeon

To shut something inside, to imprison, to confine.

prison / stable, pen / secure

prison

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

(history) a common courtier (a courtier who didn't get access to the imperial palace)

he; boyfriend

underground; subterranean

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

underground line, specifically an underground cable or wire