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Like the word devil, "diabolical" traces back to Latin diabolus, which itself descends from Greek diabolos, a word that literally means "slanderer." In English, "diabolical" has many nuances of meaning. It can describe the devil himself (as in "my diabolical visitor") or anything related to or characteristic of him in appearance, behavior, or thought; examples include "diabolical lore," "a diabolical grin," and "a diabolical plot." In British slang, "diabolical" can also mean "disgraceful" or "bad," as in "the food was diabolical."
Examples of diabolical in a Sentence
Stephanie Sengwe, PEOPLE, 30 Oct. 2025
Unfolding like a tragedy in the aftermath of diabolical events makes Agnes that much more of an effective horror story.
—Michael Lee Simpson, Entertainment Weekly, 29 Oct. 2025
Payton, though, had a diabolical third-down call in his pocket.
—Parker Gabriel, Denver Post, 27 Oct. 2025
The protagonist’s diabolical plot is fuelled by an unmanageable tangle of emotions, including raging jealousy, mercenary self-interest, and resentment of Eileen’s professional and intellectual accomplishments, which sparks shame at her own cosseted frivolity.
—Richard Brody, New Yorker, 17 Oct. 2025
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Cite this Entry
“Diabolical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diabolical. Accessed 4 Nov. 2025.
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diabolical
adjective
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