Diabolical Definition

Of, concerning, or characteristic of the devil; satanic.
American Heritage
Appropriate to a devil, especially in degree of wickedness or cruelty.
American Heritage

Origin of Diabolical

  • First attested between 1350 and 1400 from Middle English diabolik, from Middle French diabolique, from Late Latin diabolicus, from Ancient Greek διαβολ-ικός (diabolikos, “devilish"), from διάβολος (diabolos).

    From Wiktionary

  • From Middle English deabolik from Old French diabolique from Late Latin diabolicus from Latin diabolus devil devil

    From American Heritage Dictionary of the English Language, 5th Edition

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