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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Open star clusters typically reside in the dense spiral arms of the Milky Way, where the gravity of passing stars can tug at their outermost members, pulling them apart over the course of millions of years.—
Anthony Wood,
Space.com,
17 Aug. 2025
-
Finally, it is baked into a dense, tangy loaf that resembles French bread.—
Gabi De la Rosa,
Southern Living,
17 Aug. 2025
Adjective
-
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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That’s because of the NFL’s ownership rules, which are tighter than those in other sports.—
Eben Novy-Williams,
Sportico.com,
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
-
Our relationship has always been thick and strong, even through the thin times.—
Chris Hays,
The Orlando Sentinel,
20 Aug. 2025
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More than ten villages in the Buner region of the Khyber Pakhtunkhwa province were devastated by flash flooding, and dozens of people are believed to still be trapped under the thick mud and debris.—
Sophia Saifi,
CNN Money,
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
-
The seat was regarded as impenetrable by the Republicans.—
Paul Miller,
New York Daily News,
13 Aug. 2025
Adjective
-
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
-
In spring, melting ice turns them into impassable mud and floods.—
David Nikel,
Forbes.com,
16 Aug. 2025
Adjective
-
The likelihood of lightning increases as a thunderstorm gets closer and reaches its highest point when the storm is directly overhead.—
CA Weather Bot,
Sacbee.com,
28 Aug. 2025
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Some health statistics for Davidson County appear strong, but a closer look reveals key health disparities, Areola said.—
Beth Warren,
The Tennessean,
28 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 31 Aug. 2025.
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