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Synonyms

demonic

American  
[dih-mon-ik] / dɪˈmɒn ɪk /
Also demonical or daemonic

adjective

  1. inspired as if by a demon, indwelling spirit, or genius.

    Synonyms:
    possessed, obsessed, frenzied, frantic
  2. demoniac.


demonic British  
/ dɪˈmɒnɪk /

adjective

  1. of, relating to, or characteristic of a demon; fiendish

  2. inspired or possessed by a demon, or seemingly so

    demonic laughter

"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

  • demonically adverb
  • superdemonic adjective

Etymology

Origin of demonic

1655–65; < Late Latin daemonicus < Greek daimonikós, equivalent to daimon- demon- + -ikos -ic

Explanation

Demonic is a word to describe behavior or people who are extremely evil or cruel. It helps to understand this word if you know a demon is a creature of hell. Demonic has that same kind of hellish, diabolical, fiendish, infernal, satanic, unholy quality. This word should not be used lightly. Stealing a candy bar, though wrong, is not demonic. Truly evil behavior, like being a serial killer, is more likely to be described as demonic. In superhero movies, the supervillains are likely to be demonic, since they are more evil than common storybook villains.

Keep Reading on Vocabulary.com

Vocabulary lists containing demonic

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.

Olivier’s demonic anger at the world came through clearly, whereas Mr. Elordi’s Heathcliff seems as though he’d be content to simply peel away Catherine from Edgar.

From The Wall Street Journal • Feb. 11, 2026

Mick Jagger, the demonic frontman, was barely slowed by the replacement of his aortic valve in 2019.

From The Wall Street Journal • Dec. 11, 2025

Amid all of this, Scotland put in some almighty defensive sets, repelling the All Blacks with a demonic intent.

From BBC • Nov. 8, 2025

Wittingly or not, Gaines seems to understand that her ability to play the “victim” of these supposedly demonic trans forces depends on presenting herself as girlish.

From Salon • Oct. 27, 2025

It burst out of him, but he did his best to sound like a demonic villain.

From "The Bridge Home" by Padma Venkatraman