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 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
Achieving that often meant forgoing impermeable materials and permanent designs, which stands in stark contrast to the way modern-day water management works are constructed.
—Ari Caramanica, The Conversation, 8 Apr. 2025
See All Example Sentences for impermeable
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
Achieving that often meant forgoing impermeable materials and permanent designs, which stands in stark contrast to the way modern-day water management works are constructed.
—Ari Caramanica, The Conversation, 8 Apr. 2025
See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
Adjective
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Finally, it is baked into a dense, tangy loaf that resembles French bread.—
Gabi De la Rosa,
Southern Living,
17 Aug. 2025
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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,
17 Aug. 2025
Adjective
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When culture starts performing alignment instead of living it, most companies reach for fixes: tighter messaging, new values, more playbooks.—
Vibhas Ratanjee,
Forbes.com,
15 Aug. 2025
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This one even comes with a synthetic cork cap that creates a tight seal and can be washed and reused along with the bottle.—
Emily Farris,
Bon Appetit Magazine,
14 Aug. 2025
Adjective
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In the movies, zombies are impervious to knives, guns, katanas, spiked baseball bats and most other weapons an inventive auteur can think up.—
Jason Rose,
Forbes.com,
6 Aug. 2025
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For instance, more construction in an area can lead to more impervious surfaces that retain water or shunt it toward a certain neighborhood.—
Umair Irfan,
Vox,
4 July 2025
Adjective
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Each Jesse & Ben’s fry is three-eights of an inch thick.—
Andrew Watman,
Forbes.com,
7 Aug. 2025
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Rare models like a two-door Runabout might push $50K. Along with help from Jeff Humble, president of the Northern Michigan Ts (the local Model T club), Dean trained himself to drive the Model T using an original owner’s manual as thick as Manhattan’s phone book.—
The Detroit News,
Chicago Tribune,
6 Aug. 2025
Adjective
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Frere-Jones manages to make Hardwick’s sometimes impenetrable prose sound like the coolest hat trick.—
Brittany Allen,
Literary Hub,
24 July 2025
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Royal carriages are, of course, not quite as impenetrable as the presidential state car, nicknamed The Beast.—
Jack Royston,
MSNBC Newsweek,
15 July 2025
Adjective
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Numerous roads will likely be impassable under several feet of water and vehicles will likely be submerged.—
NC Weather Bot,
Charlotte Observer,
18 Aug. 2025
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In spring, melting ice turns them into impassable mud and floods.—
David Nikel,
Forbes.com,
16 Aug. 2025
Adjective
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Read More: The Real Danger of the Trump-Putin Summit At the press conference, Putin talked about how close Russia was to America (shades of Sarah Palin) and claimed that Russian trade with American has increased by 20%.—
Richard Stengel,
Time,
16 Aug. 2025
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Still, don’t fully count out the Cajuns — at least to keep it close.—
Maddie Hartley
August 15,
Kansas City Star,
15 Aug. 2025
Adjective
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The immolation of the Bronx was all the more staggering because, a generation before, it had been filled with upwardly mobile residents in sturdy homes.—
Daniel Immerwahr,
New Yorker,
18 Aug. 2025
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For five rounds, Chimaev rag-dolled a massive and sturdy champion in Dricus Du Plessis en route to a decisive victory (50-44 x3).—
Brian Mazique,
Forbes.com,
17 Aug. 2025
Cite this Entry
“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 21 Aug. 2025.
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