Definition of duergar in US English:

duergar

noun

  • In (especially Scandinavian) folklore and mythology: (treated as plural, frequently with the) dwarves or similar supernatural beings as a class or race. Also later as a count noun: a dwarf.

Origin

Mid 18th century; earliest use found in Thomas Warton (1728–1790), poet and historian. From Old Icelandic dvergar, plural of dvergr dwarf.