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evil spirit, prince of demons, from Latin Asmodaeus, from Greek Asmodaios, from Talmudic Hebrew Ashmeday, from Avestan Aeshma-dæva, "Aeshma the deceitful," from aeshma "anger," daeva- "spirit, demon."
in Jewish legend, the king of demons. According to the apocryphal book of Tobit, Asmodeus, smitten with love for Sarah, the daughter of Raguel, killed her seven successive husbands on their wedding nights. Following instructions given to him by the angel Raphael, Tobias overcame Asmodeus and married Sarah.