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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The proposal also would impose restrictions on impervious surfaces that allow little or no stormwater infiltration into the ground, like pavement and parking lots.—
Austin Hornbostel,
Nashville Tennessean,
5 Aug. 2025
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Researchers at the University of Wisconsin-Milwaukee monitored the beach for close to two decades and found that bacteria, impervious surfaces that increased runoff, and lack of water flow due to the breakwater were largely to blame for the constant closures.—
Caitlin Looby,
jsonline.com,
23 July 2025
Adjective
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The sturdy handle and thicker walls echo the utility these beers were brewed for—robust, satisfying, and meant to be lingered over.—
Hudson Lindenberger,
Forbes.com,
20 Aug. 2025
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One is a Dutch oven, a heavy pot with thick walls and a tight-fitting lid, typically cast iron and traditionally used for stews, soups and bread.—
Lisa Gutierrez,
Kansas City Star,
20 Aug. 2025
Adjective
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The final product was a tank-like fortress that appeared to be impenetrable by the howling wind.—
Frederick Dreier,
Outside,
18 Aug. 2025
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The seat was regarded as impenetrable by the Republicans.—
Paul Miller,
New York Daily News,
13 Aug. 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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Banished to the bullpen after struggling in the starting rotation, Montas trails only closer Edwin Díaz as the Mets’ most expensive reliever.—
Will Sammon,
New York Times,
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 29 Aug. 2025.
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