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
My father’s 1930s interviews tell stories of couples who defied Chicago’s seemingly impermeable color line.
—
Dorothy Roberts, Time, 13 Feb. 2026
Driveway materials can be impermeable or permeable—so traditional concrete and asphalt, or a pervious solution that allows rainwater to pass through.
—Alexandra Kelly, Martha Stewart, 9 Feb. 2026
The impermeable seed coat strategy generally helps survival of the species by making sure all of a season’s crop don’t germinate in the same year.
—Paul Cappiello, Louisville Courier Journal, 21 Nov. 2025
The discovery could enable large-scale use of impermeable coatings once limited by graphene’s scalability issues.
—Aamir Khollam, Interesting Engineering, 12 Nov. 2025
See All Example Sentences for impermeable
Dorothy Roberts, Time, 13 Feb. 2026
Driveway materials can be impermeable or permeable—so traditional concrete and asphalt, or a pervious solution that allows rainwater to pass through.
—Alexandra Kelly, Martha Stewart, 9 Feb. 2026
The impermeable seed coat strategy generally helps survival of the species by making sure all of a season’s crop don’t germinate in the same year.
—Paul Cappiello, Louisville Courier Journal, 21 Nov. 2025
The discovery could enable large-scale use of impermeable coatings once limited by graphene’s scalability issues.
—Aamir Khollam, Interesting Engineering, 12 Nov. 2025
See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
Adjective
-
In his view, a perspective from an external lens adds dimensionality to problems that may have become impervious or desensitized within a department.—
Daniel Fusch,
USA Today,
18 May 2026
-
The drug, daraxonrasib, works by targeting KRAS, a protein inside the cancer cells that was previously considered to be impervious.—
Cara Lynn Shultz,
PEOPLE,
14 May 2026
Adjective
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And with tight refurbishment and decommissioning timelines, along with fire safety and hazardous substance compliance risks, many organizations simply don’t have the time to experiment with circularity techniques and default to funneling recyclable textiles into waste management.—
Jennifer Bringle,
Footwear News,
19 May 2026
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Landry’s substantial golden parachute is likely to draw scrutiny from lawmakers and higher education watchdogs as Florida Republicans continue to push universities to demonstrate tighter oversight of spending and administration costs.—
Garrett Shanley,
Miami Herald,
19 May 2026
Adjective
-
Plants form a dense tuft of stiff grass-like foliage.—
Kim Toscano,
Southern Living,
19 May 2026
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Along the way, the grade grows dramatically, temperatures drop, and the views and climate zones shift from dense forest to alpine tundra.—
Travel + Leisure Editors,
Travel + Leisure,
19 May 2026
Adjective
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Pantelleria Closer to Tunisia than mainland Italy, Pantelleria is a remote volcanic island dotted with traditional dammusi, thick-walled, domed stone dwellings built to keep out the heat.—
Nicky Swallow,
Travel + Leisure,
17 May 2026
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Rodriguez Singh appeared behind the thick visitation glass, just feet away, seemingly prepared to talk.—
Doug Dunbar,
CBS News,
16 May 2026
Adjective
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Then, style it with jeans to hit the town for drinks with your closest friends.—
Caroline Hughes,
Travel + Leisure,
20 May 2026
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Here, over a dozen or so hammocks hang from palm trees, swaying just over the water, close enough to dip your toes.—
Condé Nast,
Condé Nast Traveler,
19 May 2026
Adjective
-
When faced with a unified, impenetrable front that raises the geopolitical costs of his disruption, Trump simply moves on.—
Jeffrey Sonnenfeld,
Time,
11 May 2026
-
Elite defenses have increasingly tested and thwarted Denver’s once-impenetrable two-man game in the playoff moments that often steer front offices in their decision-making.—
Bennett Durando,
Denver Post,
1 May 2026
Adjective
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Faced with an impassable strait, carriers did not hold vessels in indefinite anchorage.—
Glenn Taylor,
Footwear News,
7 May 2026
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Many of the landmarks along the Byway are only open during the warm season, and heavy snowstorms and ice make some sections impassable during winter.—
Cu Fleshman,
Travel + Leisure,
3 May 2026
Adjective
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The multiple attacks could be a major victory for the jihadis in a city seen as impregnable, despite attackers often targeting troops and villages on the outskirts of the city.—
Haruna Umar,
Los Angeles Times,
17 Mar. 2026
-
The multiple attacks could be seen as a major victory for the jihadis in a city seen as impregnable despite the jihadis often targeting troops and villages on the outskirts of the city.—
ABC News,
ABC News,
16 Mar. 2026
Cite this Entry
“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 20 May. 2026.
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