Definition of viciousnext
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as in unlawful
not conforming to a high moral standard; morally unacceptable a truly vicious person detested by almost everyone

Synonyms & Similar Words

Antonyms & Near Antonyms

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Synonym Chooser

How does the adjective vicious differ from other similar words?

Some common synonyms of vicious are corrupt, degenerate, iniquitous, nefarious, and villainous. While all these words mean "highly reprehensible or offensive in character, nature, or conduct," vicious may directly oppose virtuous in implying moral depravity, or may connote malignancy, cruelty, or destructive violence.

a vicious gangster

Where would corrupt be a reasonable alternative to vicious?

The synonyms corrupt and vicious are sometimes interchangeable, but corrupt stresses a loss of moral integrity or probity causing betrayal of principle or sworn obligations.

city hall was rife with corrupt politicians

In what contexts can degenerate take the place of vicious?

The words degenerate and vicious can be used in similar contexts, but degenerate suggests having sunk to an especially vicious or enervated condition.

a degenerate regime propped up by foreign powers

When could iniquitous be used to replace vicious?

While in some cases nearly identical to vicious, iniquitous implies absence of all signs of justice or fairness.

an iniquitous system of taxation

When can nefarious be used instead of vicious?

In some situations, the words nefarious and vicious are roughly equivalent. However, nefarious suggests flagrant breaching of time-honored laws and traditions of conduct.

the nefarious rackets of organized crime

When is it sensible to use villainous instead of vicious?

Although the words villainous and vicious have much in common, villainous applies to any evil, depraved, or vile conduct or characteristic.

a villainous assault

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of vicious Oldman scored high marks for his performance as a corrupt New York homicide detective involved with a vicious hitwoman (Lena Olin) in Romeo Is Bleeding (1993). — Mike Barnes, HollywoodReporter, 28 Oct. 2026 The other was Albrecht Hohler, thirty, a Communist member of the paramilitary group the Red Front Fighters and well known locally as a particularly vicious thug—a petty criminal who had been released from jail only a few months earlier. — Literary Hub, 27 Oct. 2026 The vicious cycle of the current model, of course, is that to become marketable a team needs to get and retain good players, and to do that a school has to spend money, which cycles the whole thing back to the start. — Dana O’Neil, CNN Money, 24 Oct. 2026 This creates a vicious cycle, where one condition makes the other worse. — Md Published, Verywell Health, 23 Oct. 2026 See All Example Sentences for vicious
Recent Examples of Synonyms for vicious
Adjective
  • The normally quiet state race became the focus on intense scrutiny because of a pattern of incendiary remarks by French, the former Tarrant County GOP chair.
    — Ciara McCarthy, Fort Worth Star-Telegram, 4 Nov. 2026
  • Lara faced intense scrutiny and criticism during his eight years in office from Californians frustrated by rising prices, fewer options and how their claims were handled.
    — Stephen Hobbs, Sacbee.com, 4 Nov. 2026
Adjective
  • In Samo’s warped reality, omnipresent hornets gain an evil power, forcing him to confront his mother in what could turn into a brutal showdown.
    — Georg Szalai, HollywoodReporter, 30 Oct. 2026
  • At this point, both teams are just playing for bowl eligibility, with brutal November schedules awaiting each team.
    — Steven Johnson, Fort Worth Star-Telegram, 30 Oct. 2026
Adjective
  • Runa’s incarceration – and death months after her release – is now the subject of a lawsuit brought by her mother against Hyogo Prefectural Police alleging unlawful arrest and detention.
    — Hanako Montgomery, CNN Money, 24 Oct. 2026
  • Last month, the seizure was ruled unlawful by the California Supreme Court.
    — Iris Kwok, Los Angeles Times, 24 Oct. 2026
Adjective
  • Reducing Gulliver’s Travels to only a topsy-turvy tale of humans both tiny and massive is to ignore the savage intellect that penned its words.
    — Literary Hub, Literary Hub, 28 Oct. 2026
  • In ancient, supposedly more savage times, public killings were common.
    — Dr. Michael Good, Hartford Courant, 22 Oct. 2026
Adjective
  • Can someone manipulate them through prompt injection or malicious data into crossing those boundaries?
    — Alex Spokoiny, Forbes.com, 30 Oct. 2026
  • Name the pattern Most bloviators aren't malicious, in my experience; it's just become their style.
    — Dorie Clark, Contributor, CNBC, 30 Oct. 2026
Adjective
  • Manufacturers can scale output efficiently as energy-intensive heating is eliminated and chemical waste is reduced.
    — Mrigakshi Dixit, Interesting Engineering, 29 Oct. 2026
  • Manifesting intensive therapy and mandatory anger-management classes for Rob.
    — Emma Sharpe, Vulture, 28 Oct. 2026
Adjective
  • People talking to an AI in an abusive and cruel way are more likely to be associated with trying to get the AI model to engage in dangerous requests, like trying to get around an AI’s safety guardrails, Campbell added.
    — Hadas Gold, CNN Money, 1 Nov. 2026
  • From the very start, the students assigned as guards went on cruel power trips and repeatedly humiliated — if not psychologically tortured — the inmates, to the point that some of the prisoners suffered nervous breakdowns.
    — Frank Landymore, Futurism, 29 Oct. 2026
Adjective
  • One of the guests chuckles with evil delight when Kerry confirms that someone got in trouble.
    — Rafaela Bassili, Vulture, 3 Nov. 2026
  • Vallow Daybell holds doomsday religious beliefs and has claimed that people in her life were possessed by evil spirits.
    — ABC News, ABC News, 2 Nov. 2026

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Cite this Entry

“Vicious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/vicious. Accessed 6 Nov. 2026.

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