Zahhā or Zahāk or Bivar Asp ("he who owns ten thousands of horses") is an evil figure in Iranian mythology, evident in ancient Iranian folklore as Aži Dahāka (Azh dahak), the name by which he also appears in the texts of the Avesta. In Zoroastrianism, Zahak (going under the name Aži Dahāka) is considered the son of Angra Mainyu, the foe of Ahura Mazda. Aži is the Avestan word for "serpent" or "dragon". The original meaning of dahāka is uncertain. Among the meanings suggested are "stinging", "burning", "man" or "manlike", "huge" or "foreign".