Why does ‘dungeon’, in the context of roleplaying games and D&D in particular, mean the places adventurers go to kill stuff?

I'm asking because ‘dungeon’ usually means a kind of prison, and I can't see how it evolved into “hunting ground”, or however it’s used in D&D.

Why does ‘dungeon’, in the context of roleplaying games and D&D in particular, mean the places adventurers go to kill stuff?

I’m asking because ‘dungeon’ usually means a kind of prison, and I can’t see how it evolved into “hunting ground”, or however it’s used in D&D.

Why do D&D, and other RPGs', players use 'dungeon' to mean the places they go to kill stuff?

I'm asking, because, dungeon usually means, or meant, a kind of prison, so I can't see how it evolved into "hunting ground", or however it's used in D&D.

Why does ‘dungeon’, in the context of roleplaying games and D&D in particular, mean the places adventurers go to kill stuff?

I'm asking because ‘dungeon’ usually means a kind of prison, and I can't see how it evolved into “hunting ground”, or however it’s used in D&D.