Etymology
Ragnarok (n.)

in Norse mythology, the last battle of the world, in which gods and men will be destroyed by monsters and darkness, 1770, from Old Norse Ragnarök, from ragna, genitive of rögn "gods" + rök "destined end" or rökr "twilight," which is related to reykr "smoke, steam" (see reek (v.)). Compare Gotterdammerung.

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