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Synonyms

vicious

American  
[vish-uhs] / ˈvɪʃ əs /

adjective

  1. spiteful; malicious.

    vicious gossip;

    a vicious attack.

    Synonyms:
    malevolent
  2. savage; ferocious.

    They all feared his vicious temper.

  3. (of an animal) having bad habits or a cruel or fierce disposition.

    a vicious bull.

  4. unpleasantly severe.

    a vicious headache.

  5. addicted to or characterized by vice; grossly immoral; depraved; profligate.

    a vicious life.

    Synonyms:
    sinful, iniquitous, corrupt, abandoned
    Antonyms:
    moral
  6. given or readily disposed to evil.

    a vicious criminal.

  7. reprehensible; blameworthy; wrong.

    a vicious deception.

  8. characterized or marred by faults or defects; faulty; unsound.

    vicious reasoning.

  9. Archaic. morbid, foul, or noxious.


vicious British  
/ ˈvɪʃəs /

adjective

  1. wicked or cruel; villainous

    a vicious thug

  2. characterized by violence or ferocity

    a vicious blow

  3. informal unpleasantly severe; harsh

    a vicious wind

  4. characterized by malice

    vicious lies

  5. (esp of dogs, horses, etc) ferocious or hostile; dangerous

  6. characterized by or leading to vice

  7. invalidated by defects; unsound

    a vicious inference

  8. obsolete noxious or morbid

    a vicious exhalation

"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

Etymology

Origin of vicious

First recorded in 1300–50; Middle English or directly from Anglo-French, from Latin vitiōsus, equivalent to viti(um) “fault, defect, vice” ( see vice 1) + -ōsus -ous

Explanation

Vicious is an adjective that means intentionally harmful or nasty. If you spread vicious rumors about a person, you're telling people things that will hurt her feelings or ruin her reputation. Cut it out! If you're described as vicious, you're someone who does brutal things on purpose, out of ill-will towards others, like beating up defenseless puppies or poisoning the drinking water for a town. You're worse than just mean if you are vicious — in fact, you're evil! People (and puppies) will be wise to keep their distance. Other things, like gossip, animals, or cars from horror movies can be vicious, too.

Keep Reading on Vocabulary.com

Vocabulary lists containing vicious

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.

See Examples For:

This is not an addiction drama of vicious rock bottoms and wild misbehavior.

From The Wall Street Journal Aug. 13, 2026

However, it faces a shrinking domestic market, vicious competition and squeezed profits.

From Barron's Aug. 9, 2026

For all of the vicious debates over sex ed in the ’90 and 2000s, those pushing abstinence and those promoting comprehensive health education could largely agree on one thing: We wanted teen pregnancies to decrease.

From Slate Jul. 28, 2026

The film also shows Maddox and her father in a vicious argument inside her car that illustrates the fracturing of their once-close bond.

From Los Angeles Times Jul. 22, 2026

It is a vicious thing, and a cursed thing, surely to be cast away by gods and men alike.

From "Beasts of Prey" by Ayana Gray

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