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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
Continue reading … FROM FOX SPORTS – Aaron Judge credited the spirits of former Yankees greats when the slugger was asked about how arguably one of the most important home runs of his career managed to avoid foul territory. Staff, FOXNews.com, 8 Oct. 2025 StudioCanal, which produces the Paddington movies, and Paddington Bear’s rights holders are suing Avalon after the British producer’s Spitting Image series on YouTube depicted Paddington as a foul-mouthed podcast host. Jake Kanter, Deadline, 6 Oct. 2025
Verb
The electrolyzer’s design addresses fouling, current distribution, and thermal management, which are common failure points for electrochemical systems receiving heterogeneous feedstocks. Kapil Kajal, Interesting Engineering, 23 Sep. 2025 Jonathan Kuminga #00 of the Golden State Warriors goes up to shoot and gets fouled by Malik Monk #0 of the Sacramento Kings during the fourth quarter of an NBA basketball game at Chase Center on March 13, 2025 in San Francisco, California. Gabe Smallson, MSNBC Newsweek, 20 Sep. 2025 See All Example Sentences for foul
Recent Examples of Synonyms for foul
Adjective
  • The Nintendo Switch era has been turbulent for the franchise, to put it mildly.
    Ryan Gaur, Rolling Stone, 14 Oct. 2025
  • Now, in an increasingly turbulent world, those barriers are going back up.
    Gordon G. Chang, MSNBC Newsweek, 13 Oct. 2025
Adjective
  • Even if most of these conditions are met, one or two unfair elements can strongly shape overall perceptions of fairness.
    Jason Ma, Fortune, 12 Oct. 2025
  • Creativity is the last unfair advantage left.
    Erik Huberman, Rolling Stone, 10 Oct. 2025
Adjective
  • Add in moisture and soap scum, and kitchen sinks can get pretty disgusting.
    Halee Miller Van Ryswyk, Better Homes & Gardens, 6 Oct. 2025
  • In Johnston’s reimagining, Jim and Credenza Twit operate the most disgusting, dangerous, and idiotic amusement park in the world, Twitlandia.
    Melanie Goodfellow, Deadline, 6 Oct. 2025
Adjective
  • This culture is incredibly cruel, and things have gotten really obscene.
    Brian Davids, HollywoodReporter, 10 Oct. 2025
  • In 2009, former Tennessee Titans owner Bud Adams was fined $250,000 for making an obscene gesture toward a Buffalo Bills fan.
    Cole Sullivan, MSNBC Newsweek, 7 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
  • For collaborating with British officers while on parole, he was transferred to solitary confinement in a filthy cell.
    Stacy Schiff, The Atlantic, 8 Oct. 2025
  • Trying to expose the trafficking, abuse, and the filthy networks that protect the wealthy and powerful puts you in danger.
    Khaleda Rahman, MSNBC Newsweek, 30 Sep. 2025
Verb
  • 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
  • As more success suddenly comes his way, McKinstry has remained the same, friendly and chuckling at his locker, dirtying his jersey and pestering opponents on the field.
    Cody Stavenhagen, New York Times, 10 July 2025
Verb
  • For instance, an injunction to stop a company from polluting a lake is premised on the idea that damage to a lake and the life in it is irreparable.
    Dan Bernstein, Sportico.com, 16 Oct. 2025
  • Gas from Tehran fuels nearly a third of Iraq's electricity generation, yet frequent and prolonged outages remain common, forcing residents to rely on costly, polluting private generators.
    Emma Graham, CNBC, 15 Oct. 2025

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Cite this Entry

“Foul.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/foul. Accessed 17 Oct. 2025.

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