as in evil
not conforming to a high moral standard; morally unacceptable the chaste heroines and nefarious villains of old-time melodramas

Synonyms & Similar Words

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How does the adjective nefarious differ from other similar words?

Some common synonyms of nefarious are corrupt, degenerate, iniquitous, vicious, and villainous. While all these words mean "highly reprehensible or offensive in character, nature, or conduct," nefarious suggests flagrant breaching of time-honored laws and traditions of conduct.

the nefarious rackets of organized crime

Where would corrupt be a reasonable alternative to nefarious?

While in some cases nearly identical to nefarious, corrupt stresses a loss of moral integrity or probity causing betrayal of principle or sworn obligations.

city hall was rife with corrupt politicians

When could degenerate be used to replace nefarious?

In some situations, the words degenerate and nefarious are roughly equivalent. However, degenerate suggests having sunk to an especially vicious or enervated condition.

a degenerate regime propped up by foreign powers

When can iniquitous be used instead of nefarious?

The words iniquitous and nefarious are synonyms, but do differ in nuance. Specifically, iniquitous implies absence of all signs of justice or fairness.

an iniquitous system of taxation

When might vicious be a better fit than nefarious?

The meanings of vicious and nefarious largely overlap; however, vicious may directly oppose virtuous in implying moral depravity, or may connote malignancy, cruelty, or destructive violence.

a vicious gangster

When would villainous be a good substitute for nefarious?

While the synonyms villainous and nefarious are close in meaning, 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 nefarious Whether these changes are intentional or nefarious isn’t necessarily the question. Mika Newton, Forbes.com, 13 May 2025 Given that DeSantis graduated from both Yale and Harvard, to issue such an order implies either illness or deeply nefarious intent. Sun Sentinel Editorial Board, Sun Sentinel, 9 May 2025 This isn’t to say that the platform isn’t nefarious. Deni Ellis Béchard, Scientific American, 7 May 2025 An unnamed American intelligence agency oversees the world with staggering precision, never allowing a nefarious actor to elude its vision for too long. Christian Zilko, IndieWire, 7 May 2025 See All Example Sentences for nefarious
Recent Examples of Synonyms for nefarious
Adjective
  • Rakshasa’s evil beast fits thematically with the park’s nearby 1976 Demon looping coaster.
    Brady MacDonald, Oc Register, 28 May 2025
  • Evans gives an oversized comedic performance as the church’s charming but evil minister.
    Zack Sharf, Variety, 27 May 2025
Adjective
  • The court concluded that the administration’s unilateral actions without approval by Congress were unlawful.
    Adam S. Minsky, Forbes.com, 23 May 2025
  • Of note: Your Content must not be false, defamatory, misleading or hateful, or infringe any copyright or any other third-party rights or otherwise be unlawful.
    Will Matsuda, New York Times, 23 May 2025
Adjective
  • Researchers also noted the chatbot engaging in other potentially disturbing—though not necessarily immoral—behavior.
    Will McCurdy, PC Magazine, 24 May 2025
  • Suggesting that being out of work is immoral, as opposed to the conditions that contribute to people’s ability to work and live, might be a more appropriate source of anxiety.
    Lauren Coulman, Forbes.com, 15 May 2025
Adjective
  • The sinful acts on display here are a direct result of that disenfranchisement, an effort to reclaim what is still owed, forty acres and a mule, with interest.
    Richard Newby, HollywoodReporter, 22 Apr. 2025
  • Pope Gregory, believing these demons to be an indication of Magdalene’s excessively sinful past, identified her as an unnamed woman in Luke who wipes Jesus’ feet with her hair.
    Eliza Griswold, New Yorker, 19 Apr. 2025
Adjective
  • The original 2006 film, which was adapted from Lauren Weisberger’s book of the same name, starred Meryl Streep as the powerful Miranda Priestley, Anne Hathaway as fashion newbie Andy Sachs, Emily Blunt as vicious assistant Emily and Stanley Tucci as Miranda’s right hand man Nigel.
    Rachel McRady, People.com, 23 May 2025
  • The synopsis reads: Prom season at Shadyside High is underway and the school’s wolfpack of It Girls is busy with its usual sweet and vicious campaigns for the crown.
    DeVonne Goode, Parents, 22 May 2025
Adjective
  • Finally, the mint julep is a vile almost undrinkable beverage.
    John Cherwa, Los Angeles Times, 3 May 2025
  • Along with receiving vulgar comments in person and people taking her picture on campus, the 18-year-old has received vile and sexist messages after her phone number was posted online.
    David Chiu, People.com, 1 Apr. 2025
Adjective
  • Blast off at Baltimore's science fiction convention, see natural beauty envisioned by artists from around the world, take a stroll after dark at the zoo, celebrate Baltimore creatives or go to a legendary concert.
    John Coffren, Baltimore Sun, 22 May 2025
  • His dark worldview is premised on the pessimistic presumption that the world will turn on the Jews if given the chance, which is why the Israeli leader has long prized hard power over diplomatic understandings.
    Yair Rosenberg, The Atlantic, 22 May 2025
Adjective
  • Glorifying motherhood, meanwhile, in practical terms, may only make mothers’ daily lives worse.
    Lily Meyer, The Atlantic, 23 May 2025
  • But, are seed oils worse than saturated animal fats?
    Marianne Krasny, Forbes.com, 23 May 2025

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Cite this Entry

“Nefarious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nefarious. Accessed 1 Jun. 2025.

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