No one "somehow dies" in Dungeon World.
Yes, philosophically, all adventurers are mortal, each adventurer's death is an accident, nobody wakes up in the morning thinking "well, I guess this is the day the Apocalypse Dragon dissolves me into chaos". However, mechanically, nobody takes damage unless you the GM decide they do. (Okay, some ...
Believe it or not, the rules state this directly:
No matter the prospects of resurrection for now you make a new
character. Maybe a hireling becomes a full-fledged adventurer worthy
of a whole share and a part in the real action... In any case, make your new character as you normally would at level 1. (Dungeon World, First Edition, p. 24)
Narratively, the ...