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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.

Regardless, standout performances such as Daniel Camargo’s compelling prince, Léa Fleytoux’s fabulously arrow-sharp Firebird and Patrick Frenette’s demonic sorcerer held the stage with impressive individuality.

From The Wall Street Journal • Mar. 18, 2026

Online sleuthing leads Evy and Justin to a demonic creature that causes miscarriages and stillbirths: Abyzou, the bitter spirit of an infertile woman who visits chaos upon other pregnancies.

From The Wall Street Journal • Mar. 12, 2026

They worked it downfield, through the puddles, through and around the demonic Italian players, over halfway and into the enemy 22.

From BBC • Feb. 7, 2026

But most of the time, the symbolism of demonic possession violating the “purity” of the small, usually blonde girl is slightly less blunt.

From Salon • Oct. 27, 2025

The reason was that they could not stop staring—with a curious mixture of fascination, fear, and uneasiness—at Mr. Curtain in his green-plaid suit, silvery glasses, and demonic wheelchair.

From "The Mysterious Benedict Society" by Trenton Lee Stewart