English Dictionary

permadeath

noun

(video games, slang) Permanent death, where the player cannot continue but is obliged to restart the game from the beginning.

In this game, permadeath is a major feature that adds to the challenge and excitement.

意味（1）

(video games, slang) Permanent death, where the player cannot continue but is obliged to restart the game from the beginning.

And yes, especially 'special' mobs coming back is a bit of a stretch. But then the players coming back is a stretch too, no? (yes, I know, many have implemented some form of permadeath).