de- + spawn
despawn (third-person singular simple present despawns, present participle despawning, simple past and past participle despawned)
- (video games, ergative) (of an entity in the game world) To be instantaneously destroyed or removed.
- A mob will immediately despawn if ever there is no player within 128 blocks of it.
- The helicopter despawned shortly after take-off, leaving the player in an unexpected free fall.
- The game despawns the enemies after you kill them 15 times or so.