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adverb

Synonym Chooser

How does the adjective filthy differ from other similar words?

Some common synonyms of filthy are dirty, foul, nasty, and squalid. While all these words mean "conspicuously unclean or impure," 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

When might dirty be a better fit than filthy?

In some situations, the words dirty and filthy are roughly equivalent. However, 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 would foul be a good substitute for filthy?

The words foul and filthy are synonyms, but do differ in nuance. Specifically, 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

How is nasty related to other words for filthy?

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

In what contexts can squalid take the place of filthy?

The synonyms squalid and filthy are sometimes interchangeable, but 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 filthy
Adjective
Goalkeeper Hannah Hampton laid on a filthy pass (above) to help set up Lauren James’ goal, who finished with typical aplomb. Phil Hay, New York Times, 10 July 2025 But this is a failure, not least because the government has managed to turn public transit and city sidewalks into filthy encampments and dangerous zombie drug dens. Susan Shelley, Oc Register, 4 July 2025 These words are so filthy, even 40 years later, that Tribune editors will only allow an edited version to be included here. Kori Rumore, Chicago Tribune, 11 July 2025 The girl is so filthy that just one look at her gets across the idea that this lifestyle is repellent. Los Angeles Times, 10 July 2025 See All Example Sentences for filthy
Recent Examples of Synonyms for filthy
Adjective
  • The law requires pornographic websites to verify users’ ages – for example by making users scan and upload their driver’s license – before granting access to content that is deemed obscene for minors but not adults.
    Meg Leta Jones, The Conversation, 27 June 2025
  • Lawsuit alleges 'obscene' government overreach Longo's lawsuit, filed in Chemung County, New York, names the county, the city of Elmira and several DEC officers as defendants.
    Jeanine Santucci, USA Today, 12 July 2025
Adjective
  • That version of Boldy — the skilled scorer not afraid to go to the dirty areas — had superstar qualities and scored some big-time goals.
    Michael Russo, New York Times, 31 July 2025
  • Another is to use one of the brand's sprays and spritz the dirty surface, wipe it down, then rinse with water.
    Maria Sabella, Better Homes & Gardens, 31 July 2025
Adverb
  • It’s coated in a thin layer of real gold – not just to look fancy, but because gold reflects infrared light extremely well.
    Adi Foord, Space.com, 26 July 2025
  • The Jacksonville Jaguars made an extremely aggressive move in the 2025 NFL Draft.
    Evan Massey, MSNBC Newsweek, 25 July 2025
Adjective
  • By The Athletic’s count, over nine innings during the Yankees’ 6-2 win over the Mets, those fans aimed the same vulgar chant at Soto a whopping 38 times.
    Will Sammon, New York Times, 17 May 2025
  • Because at the time, Madonna was seen as this controversial and sort of vulgar character.
    Terry Gross, NPR, 17 July 2025
Adjective
  • On the palate, the wine is velvety and streamlined with notes of black cherry, dusty chocolate mocha and graphite, with a long elegant finish.
    Liz Thach, Forbes.com, 28 July 2025
  • Silvery fabric curtained the frame around him, floating loosely in the cold, dusty air.
    Lizz Schumer, People.com, 28 July 2025
Adverb
  • And a lot of people took it very much to heart and very seriously.
    Ed Masley, AZCentral.com, 26 July 2025
  • Pregame pyrotechnics at Nissan Stadium ignited a brief – but very noticeable – fire next to the sideline near one of the end zones.
    Gentry Estes, The Tennessean, 26 July 2025
Adverb
  • In March 2016, Justin told Vox that raising a feminist daughter – and feminist sons – was incredibly important to him.
    Stephanie Kaloi, People.com, 31 July 2025
  • The gap between the 13th and 14th being that large is difficult to comprehend, a matter of Stephenson being incredibly porous without the puck.
    Dom Luszczyszyn, New York Times, 31 July 2025
Adjective
  • The 5-foot-8, 185-pound Robinson was on the receiving end of a nasty collision with outside linebacker Brian Burns on Friday.
    Dan Duggan, New York Times, 31 July 2025
  • After dropping Monday’s opener to the Twins – following a nasty delay between the top and bottom of the ninth – the Red Sox got right back on the horse.
    Gabrielle Starr, Boston Herald, 31 July 2025

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Cite this Entry

“Filthy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/filthy. Accessed 5 Aug. 2025.

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