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 Yet, having survived the nefarious influence of its neighbor, another battle was emerging that transcended borders. The Editors, JSTOR Daily, 15 Aug. 2025 Year: 2004 Director: Jonathan Demme Runtime: 2h 9m A perfectly fine remake that features a perfectly fine performance from Washington as a former soldier who starts to think that he and his buddies (including Liev Schreiber) were brainwashed for nefarious purposes. Tim Grierson, Vulture, 15 Aug. 2025 In a lengthy statement posted on Instagram overnight Wednesday, Starr, who plays the nefarious anti-superhero Homelander, praised the show's cast, crew, and fans. EW.com, 13 Aug. 2025 In an era where data is currency and digital freedom is under threat, VPNs are not a fringe convenience or an indication of nefarious activity by the user. James Czerniawski, MSNBC Newsweek, 13 Aug. 2025 See All Example Sentences for nefarious
Recent Examples of Synonyms for nefarious
Adjective
  • As these evil forces encroach, the pup finds the courage to protect his owner and territory.
    Connor Merrihew, HollywoodReporter, 18 Aug. 2025
  • Somehow the lucky, evil, nefarious Wordle Bot guessed in just two today!
    Erik Kain, Forbes.com, 16 Aug. 2025
Adjective
  • Drake Solomon accuses his former employer of disability discrimination and an unlawful severance offer.
    Chantz Martin, FOXNews.com, 15 Aug. 2025
  • Instead, advocates say those who are not in shelter are being pushed farther and farther away from services in an attempt to escape unlawful camping citations.
    Keely Doll, The Courier-Journal, 15 Aug. 2025
Adjective
  • Rudy flames out on his first day, though, and ends up working for a shady lawyer named Bruiser (Lana Parrilla) and her gleefully immoral paralegal Deck (P.J. Byrne).
    Dave Nemetz, TVLine, 12 Aug. 2025
  • And that may be a good thing for humanity: For humans to thrive in this new era, immoral corporate executives and world leaders alike need to be replaced by AI, Gawdat advised.
    Emma Burleigh, Fortune, 6 Aug. 2025
Adjective
  • Don’t dream of leaving without ordering a gigantic slice of the coconut cake with cream cheese frosting—sinful and certainly comforting.
    Steve Forbes, Forbes.com, 30 July 2025
  • Growing up in rural Tennessee, my grandfather learned that certain activities — card playing, smoking, imbibing — were sinful.
    Peter Rowe, San Diego Union-Tribune, 18 July 2025
Adjective
  • Feeling profoundly betrayed and abandoned by David, Rebecca’s loyalty lies with the vicious and conniving Juno, the only family she’s known for the last decade.
    Aramide Tinubu, Variety, 13 Aug. 2025
  • Nothing could possibly go wrong with all the vicious alien specimens on board, right?
    Kelly Lawler, USA Today, 12 Aug. 2025
Adjective
  • Jacob called his father prior to his death, and the worried dad overheard Donald shouting vile insults at his son, said prosecutors.
    Colin Mixson, New York Daily News, 9 Aug. 2025
  • Ed and Lorraine had contact with the most vile and evil entities tied to those objects.
    Pamela McLoughlin, Hartford Courant, 5 Aug. 2025
Adjective
  • Sydney Sweeney’s new dark crime comedy Americana is new in theaters this weekend.
    Tim Lammers, Forbes.com, 15 Aug. 2025
  • One look at his lone, dark face in his Brighton High class picture tells you.
    Literary Hub, Literary Hub, 14 Aug. 2025
Adjective
  • This is all made much, much worse by the fact that Claire’s parents end up time-travelling . . .
    Erik Kain, Forbes.com, 15 Aug. 2025
  • Umbro have taken a ‘back to basics’ approach with West Ham’s kits this year, which absolutely does not mean bad.
    Nick Miller, New York Times, 15 Aug. 2025

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Cite this Entry

“Nefarious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nefarious. Accessed 29 Aug. 2025.

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