1
as in dense
impossible to get through or into
the wall of security people surrounding the rock band was impermeable
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in tight
not allowing penetration (as by gas, liquid, or light)
an impermeable seal on the ancient tomb had preserved the artifacts exceptionally well
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of impermeable
The part of Texas that flooded last week is known as Flash Flood Alley because of its impermeable limestone hills and frequent downpours, but these floods were unusually severe for the area.
—
Rebecca Hersher, NPR, 7 July 2025
The spongy material is mostly made of air, yet nearly impermeable to both air and liquid.
—Brandee Gruener, Southern Living, 7 May 2025
Given the area’s especially hard, impermeable soil and the high cost of installing private wastewater systems, many residents have resorted to straight piping to deal with human wastewater.
—Curtis Bunn, NBC news, 1 May 2025
What if the girls all band together and reject me like an impermeable cellular membrane, keeping me out, unable to penetrate their circle of friendship?
—Michael Nied, People.com, 28 Apr. 2025
See All Example Sentences for impermeable
Rebecca Hersher, NPR, 7 July 2025
The spongy material is mostly made of air, yet nearly impermeable to both air and liquid.
—Brandee Gruener, Southern Living, 7 May 2025
Given the area’s especially hard, impermeable soil and the high cost of installing private wastewater systems, many residents have resorted to straight piping to deal with human wastewater.
—Curtis Bunn, NBC news, 1 May 2025
What if the girls all band together and reject me like an impermeable cellular membrane, keeping me out, unable to penetrate their circle of friendship?
—Michael Nied, People.com, 28 Apr. 2025
See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
Adjective
-
In extremely dense fog where visibility is near zero, the best course of action is to first turn on your hazard lights, then simply pull into a safe location such as a parking lot of a local business, and stop.—
NC Weather Bot,
Charlotte Observer,
7 Oct. 2025
-
The moon's strange yellow hue is the result of a phenomenon known as Rayleigh Scattering, wherein Earth's dense atmosphere interferes with the passage of shorter, bluer wavelengths of light, while allowing longer, redder, wavelengths to pass through relatively unscathed.—
Anthony Wood,
Space.com,
7 Oct. 2025
Adjective
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So Rizza skipped the presentation format of the past in favor of a tight selection of one-on-one appointments, mostly with retailers.—
Sandra Salibian,
Footwear News,
3 Oct. 2025
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And results have largely been mixed since Carson Wentz has taken over as the starter, winning a 48-10 blowout over the Cincinnati Bengals in Week 3 and then losing a tight game in Ireland against the Pittsburgh Steelers.—
Reice Shipley,
MSNBC Newsweek,
3 Oct. 2025
Adjective
-
But that doesn't mean Davis is impervious to economic headwinds.—
Laura Hackett,
NPR,
26 Sep. 2025
-
Broder was a rare figure that was impervious to the notorious agency wars, commanding respect across agency lines.—
Nellie Andreeva,
Deadline,
24 Sep. 2025
Adjective
-
That thick sole relieves pressure and pain, especially pain associated with conditions like plantar fasciitis.—
Olivia Young,
Travel + Leisure,
8 Oct. 2025
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The smoke was thick enough to cast its own shadows upon the hill.—
Caity Weaver,
The Atlantic,
8 Oct. 2025
Adjective
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By emphasizing the caper aspect and the goofy comedy of all this over the intricate plotting that is a hallmark of Westlake’s novels, Black lowers the stakes of a heist that involves halting a speeding NY subway refuse train and busting into a supposedly impenetrable Brooklyn vault.—
David Rooney,
HollywoodReporter,
30 Sep. 2025
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Others – seemingly those who are non-religious or simply impenetrable by internet theories – quipped at the possibility.—
Melina Khan,
USA Today,
24 Sep. 2025
Adjective
-
Portions of Highway 12 may be impassable at times due to ocean overwash, especially around times of high tide.—
NC Weather Bot,
Charlotte Observer,
30 Sep. 2025
-
The famed route experienced extensive blowdowns, erosion, and landslides, resulting in much of the roadway being impassable after Helene struck in September 2024.—
Graham Hurley,
CNN Money,
21 Sep. 2025
Adjective
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Bishnoi denies involvement in Moosewala’s murder, but in an explosive interview from behind bars, accused his close aide of orchestrating it.—
Rhea Mogul,
CNN Money,
7 Oct. 2025
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The departure of Busquets and Alba means Messi will lose two of his most talented teammates and closest friends.—
Michelle Kaufman,
Miami Herald,
7 Oct. 2025
Adjective
-
Be sure to cover your head and neck with your arms, and crawl under a sturdy table if possible.—
CA Earthquake Bot,
Sacbee.com,
7 Oct. 2025
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The lone crack in Yesavage’s sturdy exterior came in the first inning.—
Mitch Bannon,
New York Times,
6 Oct. 2025
Cite this Entry
“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 9 Oct. 2025.
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