Diabolical Definition

-ĭk

adjective

Of, concerning, or characteristic of the devil; satanic.

American Heritage

Appropriate to a devil, especially in degree of wickedness or cruelty.

American Heritage

The definition of diabolical is something devilish or cunning in an evil way.

A devilish and cunning plan to take over the world is an example of a diabolical plan.

YourDictionary

Wiktionary

Synonyms:

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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