1
as in impervious
impossible to get through or into
the wall of security people surrounding the rock band was impermeable
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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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Example Sentences
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Recent Examples of impermeable
Which means the bigger the economy, the greater the means to erect an impermeable national defense system.
—
John Tamny, Forbes.com, 12 Sep. 2025
But simply piling mounds of topsoil on top of hard clay ground can result in an impermeable layer, both to water and roots.
—Andy Wilcox, Better Homes & Gardens, 7 Aug. 2025
That aquifer is covered by impermeable layers of rock or clay, putting the water in it under high pressure in some locations.
—Claire Osborn, Austin American Statesman, 30 July 2025
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
See All Example Sentences for impermeable
John Tamny, Forbes.com, 12 Sep. 2025
But simply piling mounds of topsoil on top of hard clay ground can result in an impermeable layer, both to water and roots.
—Andy Wilcox, Better Homes & Gardens, 7 Aug. 2025
That aquifer is covered by impermeable layers of rock or clay, putting the water in it under high pressure in some locations.
—Claire Osborn, Austin American Statesman, 30 July 2025
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
See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
Adjective
-
There have been concussions, and the right knee seemingly impervious to staying healthy.—
Will Graves,
Twin Cities,
8 Feb. 2026
-
Opponents said McLean’s plan would cut down 17 acres of trees and add 7 acres of impervious surfaces, worsening the periodic flooding that’s already a concern.—
Don Stacom,
Hartford Courant,
23 Jan. 2026
Adjective
-
The massacre prompted a national reckoning about violence against women and led to tighter gun laws.—
Lex Harvey,
CNN Money,
11 Feb. 2026
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However, despite workers’ noticeable preference for remote positions, the demands of employers and a much tighter job market suggest many may need to adjust to the new realities of the marketplace.—
Victoria Baeza Garcia,
Dallas Morning News,
10 Feb. 2026
Adjective
-
For years, astronomers have debated whether planets this massive could form through core accretion, the slow, bottom-up process in which solid material clumps together into a dense core that then pulls in vast amounts of gas.—
Samantha Mathewson,
Space.com,
10 Feb. 2026
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In Earth’s deep interior and under enormous pressure, a dense, hot and fluid metal core began to churn.—
Mindy Weisberger,
CNN Money,
10 Feb. 2026
Adjective
-
These caverns under sidewalks could be used for storage, and circular pieces of thick glass in the sidewalk added natural light to these eerie underground chambers.—
Jacques Kelly,
Baltimore Sun,
7 Feb. 2026
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The Bucklebury countryside is known for its thick woodlands, which add an extra layer of privacy to the exclusive area, attracting a less-flashy set.—
Bailey Bujnosek,
InStyle,
7 Feb. 2026
Adjective
-
Over the years, Grey and Pollan have remained close, often supporting one another through personal and professional milestones.—
Danielle Minnetian,
FOXNews.com,
10 Feb. 2026
-
The bus depot is two stories beneath the train platform and several blocks from the closest stairway.—
DP Opinion,
Denver Post,
10 Feb. 2026
Adjective
-
Mexico’s iconic Yucatan Peninsula is a place of contrasts, where impenetrable jungle meets wide open ocean, lush vegetation meets sandy shores, and vibrant energy meets pure serenity.—
Condé Nast Traveler,
Condé Nast Traveler,
5 Feb. 2026
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To a dog, our fervent and prolonged goodbyes at the front door might seem as peculiar and impenetrable as the greetings of an orca do to us.—
Shayla Love,
New Yorker,
4 Feb. 2026
Adjective
-
On some of the country’s biggest lakes, often hundreds of miles wide with no current, an unfavorable wind made a waterway impassible.—
Outside,
Outside,
7 Feb. 2026
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Laudable, unless the walk to the bus stop is impassable.—
Boston Herald editorial staff,
Boston Herald,
5 Feb. 2026
Adjective
-
Which explains couldn’t: if Meta had ever been a monopoly, there’s no way its shareholders would have ever allowed $70 billion in new spending meant to expand an already impregnable moat.—
John Tamny,
Forbes.com,
21 Jan. 2026
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But their quarterback issues could make those defenses look impregnable.—
Kevin Cusick,
Twin Cities,
30 Nov. 2025
Cite this Entry
“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 12 Feb. 2026.
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