Dictionary.com
Thesaurus.com
Synonyms

diabolic

American  
[dahy-uh-bol-ik] / ˌdaɪ əˈbɒl ɪk /

adjective

  1. variant of diabolical.


diabolic British  
/ ˌdaɪəˈbɒlɪk /

adjective

  1. of, relating to, or proceeding from the devil; satanic

  2. befitting a devil; extremely cruel or wicked; fiendish

  3. very difficult or unpleasant

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • diabolically adverb
  • diabolicalness noun
  • nondiabolic adjective

Etymology

Origin of diabolic

First recorded in 1350–1400; Middle English diabolik, from Middle French or directly from Late Latin diabolicus, from Greek diabolikós, equivalent to diábo(os) devil + -ikos -ic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Thus far, it has been the only diabolic flicker he’s displayed.

From Salon • Jan. 28, 2026

Sheku Tarawallie, president of Sierra Leone's Council of Traditional Healers, is adamant that "diabolic" juju men like Kanu are giving healers a bad name.

From BBC • Nov. 23, 2025

The pangrams from yesterday’s Spelling Bee were diabolic and diabolical.

From New York Times • Apr. 7, 2023

To crown all, this imaginative anthology even makes room for Arthur Machen’s dizzyingly phantasmagoric “The White People,” and that chilling fairy tale of diabolic temptation, Lucy Clifford’s “The New Mother.”

From Washington Post • Feb. 23, 2021

His implacable marshaling of facts and his logic had something of a new dialectic, diabolic in its force.

From "The Autobiography of Malcolm X" by Alex Malcolm X;Hailey