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

Relevance

Antonyms & Near Antonyms

Synonym Chooser

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 Their investigation leads them to Dayal (Soubin Shahir) and Simon (Nagarjuna), members of a crime syndicate using one of Rajasekar's inventions — a chair-like contraption with the ability to cremate bodies — for their own nefarious purposes. Randall Colburn, EW.com, 1 Sep. 2025 Some conspiracy theorists have suggested Epstein’s death was nefarious and meant to hide something. Alex Gangitano, The Hill, 22 Aug. 2025 Nashville Church of Christ claims the inquiry is a consequence of a nefarious conspiracy devised by those former congregants. Liam Adams, The Tennessean, 21 Aug. 2025 Those steps mitigate the risk of nefarious actors getting access to a physical device, leading to serious, and reputation-harming, incidents, Uenuma said. Bob Woods, CNBC, 20 Aug. 2025 See All Example Sentences for nefarious
Recent Examples of Synonyms for nefarious
Adjective
  • The inexcusable, evil acts of an individual.
    ABC News, ABC News, 14 Sep. 2025
  • He and his followers were locked in a battle with an enemy that was not just ideologically opposed but unwell, possibly evil.
    Rachel Monroe, New Yorker, 13 Sep. 2025
Adjective
  • In November, jurors convicted Martinez of unlawful compensation and a related conspiracy charge.
    Douglas Hanks, Miami Herald, 15 Sep. 2025
  • The world’s highest court, the International Court of Justice, has ruled that there is a plausible risk of genocide in Gaza, and that Israel’s occupation and apartheid against Palestinians are unlawful.
    Chris Gardner, HollywoodReporter, 12 Sep. 2025
Adjective
  • Meanwhile, cousin Edmund, an aspiring clergyman, falls under the charms of Mary Crawford, written by Austen as a charming but immoral woman.
    Emily Zarevich, JSTOR Daily, 11 Sep. 2025
  • Ladapo said the decision was not reached according to the data, but instead on his view that vaccine mandates are immoral and outside the scope of the government’s authority.
    Sarah Fortinsky, The Hill, 7 Sep. 2025
Adjective
  • In an important variation, medieval soldiers returning from war regularly spent an extended period of penance in monasteries – a recognition of Catholicism’s teaching that any war is inherently sinful.
    Timothy Gabrielli, The Conversation, 25 Aug. 2025
  • 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
Adjective
  • As and when evidence against that narrative comes out, either via six monthly reports or from some other source, the crash in the stock price will be more vicious than otherwise.
    Shivaram Rajgopal, Forbes.com, 15 Sep. 2025
  • In these homes, the conflict between budgeting and feeding kids well creates huge psychological stress for parents, which can lead to anxiety and depression, fueling the vicious cycle of stress and unhealthy eating, Beresin said.
    Yasmin Tayag, The Atlantic, 14 Sep. 2025
Adjective
  • The lingering effects of an incident so vile occurring within Burning man’s sweet bubble are bound to affect people for a long time.
    Denver Nicks, Rolling Stone, 14 Sep. 2025
  • This vile, heartless remark is completely unacceptable—especially from someone entrusted with our children.
    Amy DeLaura, The Washington Examiner, 12 Sep. 2025
Adjective
  • The night serum visibly smooths wrinkles, reduces fine lines, and soothes the appearance of dark circles and uneven skin tone.
    Gabriela Izquierdo, Southern Living, 17 Sep. 2025
  • The scent is smoky yet sweet, spicy yet smooth, dark but with an underlying lightness—the result of combining clean white musk with rose, tobacco, suede, and cumin.
    Sophia Panych, Allure, 16 Sep. 2025
Adjective
  • But that’s actually a bad thing for a couple reasons.
    Jeff Fedotin, Forbes.com, 15 Sep. 2025
  • But worse than the poverty was the verbal and physical abuse from his father.
    John Blake, CNN Money, 14 Sep. 2025

Browse Nearby Words

Podcast

Cite this Entry

“Nefarious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/nefarious. Accessed 18 Sep. 2025.

More from Merriam-Webster on nefarious

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!