Jörmungandr

Etymology
Borrowed from.

Proper noun

 * 1)  The World Serpent or Midgard Serpent, an offspring of Loki, which is thrown into the ocean by Odin but grows to encircle the world, and is finally slain during Ragnarok by Thor, who then succumbs to its poisonous breath.

Translations

 * Danish: Midgårdsormen
 * Greek: Γιόρμουνγκαντ, Γιόρμουνγκαντερ
 * Persian: یورمونگاند
 * Polish: Jormungand
 * Russian: Ёрмунганд
 * Swedish: Midgårdsormen