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foul

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verb

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Synonym Chooser

How does the adjective foul differ from other similar words?

Some common synonyms of foul are dirty, filthy, nasty, and squalid. While all these words mean "conspicuously unclean or impure," foul implies extreme offensiveness and an accumulation of what is rotten or stinking; it can also describe, for example, loathsome behavior.

a foul-smelling open sewer
a foul story of lust and greed

When can dirty be used instead of foul?

Although the words dirty and foul have much in common, dirty emphasizes the presence of dirt more than an emotional reaction to it or, figuratively, stresses meanness or despicableness.

a dirty littered street
don't ask me to do your dirty work

When could filthy be used to replace foul?

The meanings of filthy and foul largely overlap; however, filthy carries a strong suggestion of offensiveness and typically of gradually accumulated dirt that begrimes and besmears. Figuratively, it can also describe disgusting obscenity.

a stained greasy floor, utterly filthy
filthy street language

How is nasty related to other words for foul?

Nasty applies to what is actually foul or is repugnant to one expecting freshness, cleanliness, or sweetness; in practice, however, nasty is often weakened to the point of being no more than a synonym of unpleasant or disagreeable. When used figuratively, nasty implies a peculiarly offensive unpleasantness.

it's a nasty job to clean up after a sick cat
had a nasty fall
his answer gave her a nasty shock
a stand-up comedian known for nasty humor

When would squalid be a good substitute for foul?

In some situations, the words squalid and foul are roughly equivalent. However, squalid adds to the idea of dirtiness and filth that of slovenly neglect. Distinctively, its figurative use implies sordidness as well as baseness and dirtiness.

squalid slums
engaged in a series of squalid affairs

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 foul
Adjective
The ball appeared to deflect off a television sound man along the low retaining wall in foul territory before caroming into shallow right field. Beth Harris, Denver Post, 28 Oct. 2025 Davidson’s condition, which leads him to make foul-mouthed outbursts, was barely understood at the time and was the source of misunderstandings, bullying, and harassment. Scott Roxborough, HollywoodReporter, 24 Oct. 2025
Verb
With the Rockets up one, Durant fouled Gilgeous-Alexander with two seconds left, picking up his sixth personal foul and exiting the game. Ben Morse, CNN Money, 22 Oct. 2025 Despite multiple opportunities to close out the game, the Rockets fell 125-124 in double overtime after superstar Kevin Durant fouled Shai Gilgeous-Alexander with roughly two seconds left, allowing two made free throws that handed the Thunder the win. Cole Sullivan, MSNBC Newsweek, 22 Oct. 2025 See All Example Sentences for foul
Recent Examples of Synonyms for foul
Adjective
  • That would probably be the most disgusting kind.
    Ilana Kaplan, PEOPLE, 24 Oct. 2025
  • Continue reading … 'DISGUSTING' – Jen Psaki jokes Usha Vance scared of her husband, ripped for 'disgusting' comments.
    , FOXNews.com, 22 Oct. 2025
Adjective
  • With those turbulent waters somewhat behind us, the ones under the ship claim another victim, and poor Britani runs off to throw up over the side of the boat.
    Tom Smyth, Vulture, 5 Nov. 2025
  • This election will likely be remembered as a beacon during a turbulent sea of democratic backsliding, restoring the values of a city which was built on immigrant innovation and an ethos of inclusion.
    Newsweek Contributors, MSNBC Newsweek, 5 Nov. 2025
Adjective
  • Some of his artists have challenged their contracts as unfair, sparking broader debates about industry practices.
    Sasha Rogelberg, Fortune, 2 Nov. 2025
  • Both also often lead to litigation in federal court and the filing of unfair labor practices charges with the NLRB.
    Michael McCann, Sportico.com, 31 Oct. 2025
Adjective
  • Beside one of those blandly obscene bidets.
    Literary Hub, Literary Hub, 21 Oct. 2025
  • But the show avoided an FCC probe as the West Coast delay was censored, and the East Coast broadcast aired after the 6am-10pm window during which obscene content is prohibited on broadcast TV and radio.
    Glenn Garner, Deadline, 19 Oct. 2025
Adjective
  • Four plays, 76 yards, in 25 stinking seconds.
    David Aldridge, New York Times, 12 Oct. 2025
  • This is about a team with a top-10 payroll whose GM committed too stinking much of it to dogs that can’t, or won’t, pull the sled.
    Sean Keeler, The Denver Post, 22 Dec. 2019
Adjective
  • Jackson Lamb has long, greasy hair and a pot belly over which hangs a filthy old trench coat.
    Barbara Ellis, Denver Post, 20 Oct. 2025
  • On the other end, Ja’Marr Chase is coming off an absolutely filthy touchdown grab last Sunday.
    Steven Louis Goldstein, New York Times, 16 Oct. 2025
Verb
  • The ashes from the crematorium chimney covered the streets, sooted the rain, dirtied the snow, damaged the crops, infected every body.
    Literary Hub, Literary Hub, 23 Oct. 2025
  • At Dilara Findikoglu, models looked like ladies in waiting that had risen from the dead; wearing antiquated corsetry that was dirtied and torn.
    Leah Dolan, CNN Money, 23 Sep. 2025
Verb
  • If it’s harvested from an area that’s been polluted, there’s a possibility it could be contaminated with unsafe minerals like mercury or arsenic.
    Caroline C. Boyle, USA Today, 4 Nov. 2025
  • In contrast to polluting polyester, these fibers are biodegradable and will naturally decompose after disposal.
    Mrigakshi Dixit, Interesting Engineering, 4 Nov. 2025

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Cite this Entry

“Foul.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foul. Accessed 7 Nov. 2025.

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