IMPERVIOUS Synonyms: 51 Similar and Opposite Words

impervious

adjective

(ˌ)im-ˈpər-vē-əs

Definition of impervious

as in tight

not allowing penetration (as by gas, liquid, or light) the material for this coat is supposed to be impervious to rain

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

as in dense

impossible to get through or into the rain forest is impervious to all but the most dedicated explorers

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of impervious None of the eight simulations were impervious to the threats, and even when agents detected a risk, the detection didn’t translate into the agents trying to contain the threat. — Jake Angelo, semafor.com, 15 Sep. 2026 Many Russians may not regard Putin’s regime as solicitous of the public good, which could explain the withdrawal of capital from the country, but the regime is also accepted as a given, a distant presence impervious to outside influence. — Michael Kimmage, Foreign Affairs, 14 Sep. 2026 To deal with the settling, Peters and his team developed flexible flooring lined with an impervious three-ply fabric. — Jennifer Tucker, The Conversation, 7 Aug. 2026 Since her move, Hampton has established herself as England’s No 1 and one of the WSL’s most impervious goalkeepers. — Megan Feringa, New York Times, 28 July 2026 See All Example Sentences for impervious

Recent Examples of Synonyms for impervious

Adjective

Covering outdoor spigots and ensuring doors and windows are sealed tight are just a few of the items to check off the list.

— Rae Ford, Martha Stewart, 8 Nov. 2026
The surrounding gate offers tighter control over current flow, helping address the challenges of further transistor scaling.

— Atharva Gosavi, Interesting Engineering, 7 Nov. 2026

Definition of tight

Adjective

Consider taking out a few roses in dense beds to make way for a steppingstone path through the blooms.

— Rita Perwich, San Diego Union-Tribune, 7 Nov. 2026
The teams combined atomic-scale simulations with electron microscopy and experiments to see how changes in the two materials could help meet growing demand for denser data storage as AI use expands.

— Atharva Gosavi, Interesting Engineering, 7 Nov. 2026

Definition of dense

Adjective

Some layers, like sandstone, contain honeycombed pores capable of holding CO2, while others, like mudstone, can act as impermeable seals, trapping the buoyant gas underground.

— Katie Worth, ProPublica, 30 Oct. 2026
Charlotte has been blessed to grow at a fast rate, but our expansion has removed green spaces with impermeable pavement and buildings.

— Charlotte Observer, Charlotte Observer, 6 Oct. 2026

Definition of impermeable

Adjective

Hours after the attack, Prime Minister Donald Tusk said authorities found the bodies of three of the suspect's close family members -- two women and a man -- inside of his home in Ostrowiec Swietokrzyski, a city about 100 miles northeast of Krakow.

— Arkansas Online, Arkansas Online, 8 Nov. 2026
Purdue cut the deficit to 34-29 on Ijeboi's TD run but couldn't get any closer.

— CBS News, CBS News, 8 Nov. 2026

Definition of close

Adjective

And the oversized Heavenly robes are thick enough to justify padding down to the pool deck without feeling underdressed.

— Condé Nast, Condé Nast Traveler, 11 Nov. 2026
Five bedrooms and four bathrooms are spread throughout the tower, with colorful stripes bringing a playful contrast to the thick masonry walls.

— Tori Latham, Robb Report, 10 Nov. 2026

Definition of thick

Adjective

Kramer/Fauci is amazing, but there’s this downtown, opaque, dark stagecraft tradition that is impenetrable.

— Jason P. Frank, Vulture, 5 Nov. 2026
Since then, the president’s personnel and political decisions have reshaped the Senate battleground from what looked like an impenetrable red wall into a toss-up.

— Burgess Everett, semafor.com, 2 Nov. 2026

Definition of impenetrable

Adjective

Democrats have secured control of the Senate, a shocking collapse for a Republican majority that started the midterms with what looked like an impregnable red wall of conservative states.

— Burgess Everett, semafor.com, 4 Nov. 2026
After the Spanish Navy built its arsenal and shipyards in Ferrol’s almost impregnable harbor in the 18th century, the city boomed.

— Jason Horowitz, New York Times, 28 Oct. 2026

Definition of impregnable

Adjective

As of Monday morning, the Escondida bridge remains closed and impassable.

— Jennifer McRae, CBS News, 2 Nov. 2026
With these blue collar parents’ grade-school-age son a tangibly quiet presence, a seemingly impassable unhappiness oozes from the opening scenes.

— Robert Abele, Los Angeles Times, 23 Oct. 2026

Definition of impassable

Browse Nearby Words

imperturbably

impervious

impetrate

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“Impervious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impervious. Accessed 11 Nov. 2026.

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Synonyms of impervious

adjective

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