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 But the group in question — the American Inns of Court — is hardly secretive given its large public presence, and there is no evidence that members are involved in nefarious activities targeting Trump. Melissa Goldin, Twin Cities, 21 Mar. 2025 To deter nefarious acts and regardless of your home’s size, consider adding outside lights that face your residence. Nicole Letts, Southern Living, 20 Mar. 2025 But clearly, something nefarious is underpinning his campaign. Kelly Lawler, USA TODAY, 5 Mar. 2025 The military declares martial law in the town as Daniels and his fellow scientists race to develop a cure, even as the nefarious McClintock schemes to bomb Cedar Creek to smithereens to contain the virus. Ars Technica, 14 Mar. 2025 See All Example Sentences for nefarious
Recent Examples of Synonyms for nefarious
Adjective
  • At the time of Vallow's death, Vallow Daybell was espousing the belief that he was possessed by an evil spirit, the prosecution said.
    CBS News, CBS News, 8 Apr. 2025
  • Last season, there was an episode that featured an evil streaming executive — who dressed like, kind of looked like and whose name even sounded like Bela Bajaria, Netflix’s chief creative officer and your boss.
    Mikey O'Connell, HollywoodReporter, 7 Apr. 2025
Adjective
  • Federal workers, migrants and transgender troops are among the groups arguing that Trump’s policies are unlawful and will cause irreversible harm if not blocked.
    Bart Jansen, USA Today, 5 Apr. 2025
  • In January, a federal appeals court declared DACA unlawful, but kept the policy in place.
    Nidia Cavazos, CBS News, 4 Apr. 2025
Adjective
  • Firms carrying out an immoral contract in court may face other discipline.
    Josh Hammer, MSNBC Newsweek, 1 Apr. 2025
  • This legislation made its way through Congress back then in part because there was societal acceptance of the false belief that the Chinese were immutably immoral and threatening.
    Agustina Vergara Cid, Oc Register, 30 Mar. 2025
Adjective
  • Driven by a religious mandate to purify society by stopping sinful behavior, the AFMRS’s missionaries provided direct outreach to low-income areas.
    Jenna Deep, Smithsonian Magazine, 27 Mar. 2025
  • Here's the list of least-to-most sinful states, according to WalletHub: TRAVELERS FLOCK TO TOP RELIGIOUS LANDMARKS DEEMED 'MOST INSTAGRAMMABLE' (iStock) 50.
    Andrea Margolis, Fox News, 3 Mar. 2025
Adjective
  • Softened by pride, Amber slinks away herself, albeit much more cutely than Gregory and accompanied by a vicious side-eye.
    Ile-Ife Okantah, Vulture, 3 Apr. 2025
  • The Kansas City Glory’s season opener was set to begin on Saturday afternoon, but viral sensation Elena Easley was sitting on the field, experiencing a vicious headache.
    PJ Green, Kansas City Star, 30 Mar. 2025
Adjective
  • Snow White gets a much more meaningful backstory The original Disney film begins with a few short sentences about how Snow White was forced to work as a scullery maid for her vile stepmother, the Queen.
    Patrick Ryan, USA TODAY, 21 Mar. 2025
  • Newsweek's efforts to politicize the death of these individuals, including the reporter's request to confirm names and locations of death, are vile.
    Josh Hammer, Newsweek, 19 Mar. 2025
Adjective
  • Store green tea products in an airtight container in a cool, dry, dark place.
    Lindsay Curtis, Verywell Health, 4 Apr. 2025
  • TikTok briefly went dark in the US and was pulled from app stores on Jan. 18.
    Chloe Albanesius, PC Magazine, 4 Apr. 2025
Adjective
  • Jack: This is just a bad team that has occasionally had good days.
    The View from the Lane, New York Times, 5 Apr. 2025
  • What happened was my bad behavior and my angst brought the energy finally.
    Madison E. Goldberg, People.com, 5 Apr. 2025

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Cite this Entry

“Nefarious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nefarious. Accessed 15 Apr. 2025.

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