(South and Central Asian mythology)
In the Rig Veda the word asura describes the supreme spirit and means ‘spiritual, divine’. An equivalent was Ahura Mazdah, the ancient Persian deity. Afterwards the word ceased to denote a god and acquired an entirely opposite meaning, that of an anti-god or demon. Asuras descended from Prajapati, ‘the progenitor’, an aspect of Indra, Soma, and other early deities. Their dwelling-places are the caverns of Mount Sumeru and the depths of the ocean. Gods and asuras are complementary: these contenders, locked in a series of perpetual wars, never gain complete victory, since the elimination of either side would make the other redundant.




