The Devil (from Greek: or diábolos slanderer or accuser) is, according to Christianity and Islam, the primary opponent of God.
Christianity identifies the Devil ("Satan") with the Serpent who tempted Adam and Eve to eat the forbidden fruit, and describes him as a "fallen angel" who terrorizes the world through evil, is the antithesis of Truth, and shall be condemned, together with the fallen angels who follow him, to eternal fire at the Last Judgement.
Islam identifies the Devil ("Shaitan") with all those who oppose Allah.
Some non-Abrahamic religions contain figures similar to the Devil, such as the Buddhist demon Mara and the Zoroastrian spirit Angra Mainyu.
The Modern English word descends from the Middle English , from Old English , that in turn represents an early Germanic borrowing of Latin . This in turn was borrowed from Ancient Greek Greek: (diábolos), "slanderer", from 'Greek: 'διαβάλλειν (diabállein) "to slander": - (diá-) "across, through" + βάλλειν (bállein) "to hurl", probably akin to the Sanskrit gurate "he lifts up".