IMPERMEABLE Synonyms: 51 Similar and Opposite Words

impermeable

adjective

(ˌ)im-ˈpər-mē-ə-bəl

Definition of impermeable

as in impervious

impossible to get through or into the wall of security people surrounding the rock band was impermeable

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

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

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 impermeable Spain needed until the 106th minute to slip a Ferran Torres shot past the impermeable goalkeeping of Argentina’s Emiliano Martínez, whose championship-game record 11 saves proved one too few. — Jerry Brewer, New York Times, 20 July 2026 Chocolate brown stripes punctuate a light charcoal gray background, and the low-pile weave made from recycled polyester gives it an impermeable, easy-to-clean surface. — Julia Harrison, Architectural Digest, 26 June 2026 Needing to remain impermeable to everything that is said about him is another stylistic exercise built into the equation of being a global star. — Time, Time, 26 June 2026 Engineers eventually replaced them with a version made up of 20 impermeable compartments of high-pressure hoses containing water. — Mack Degeurin, Popular Science, 18 June 2026 See All Example Sentences for impermeable

Recent Examples of Synonyms for impermeable

Adjective

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

Definition of impervious

Adjective

If Trump does push ahead, his main cheerleaders will be GOP candidates in tight races this fall who are eager to market more ideas to lower costs before the midterms.

— Eleanor Mueller, semafor.com, 25 Sep. 2026
Broader cultural adoption driven by testimonials like Smith’s, and tighter clinical guardrails as physicians push back on unsupervised extended fasts.

— Hanna Wickes, Sacbee.com, 25 Sep. 2026

Definition of tight

Adjective

Morton kosher salt is also very common in home kitchens, but has denser grains than Diamond Crystal.

— Chris Morocco, Bon Appetit Magazine, 26 Sep. 2026
This approach could eventually help make magnetic memory faster, denser, and more energy efficient.

— Rupendra Brahambhatt, Interesting Engineering, 26 Sep. 2026

Definition of dense

Adjective

If the ’90s were all about thick lifestyle shoes—think basketball- and hip-hop-influenced styles like the Air Force Ones or Air Jordans—today’s models are about hugging the foot.

— Bianca Kratky, Glamour, 29 Sep. 2026
Aritzia’s fall lineup is stacked with delicious jacket options, including this boxy, cropped jacket made of a thick, soft goat suede.

— Irene Richardson, InStyle, 29 Sep. 2026

Definition of thick

Adjective

Though Best Original Song can seem impenetrable, as the Music Branch that determines the shortlist and nominees for the category has its own insular politics, Swift has inched her way closer to a nomination with every song she’s written for a film.

— Marcus Jones, IndieWire, 26 Sep. 2026
Director Padraic McKinley’s debut feature stars Ethan Hawke as a battle-scarred veteran hired to smuggle a fortune in gold across 100 miles of impenetrable wilderness.

— Payton Turkeltaub, Variety, 19 Sep. 2026

Definition of impenetrable

Adjective

Some streets in Norfolk, Virginia, were closed Wednesday due to flooding and several are expected to be impassable during high tide Thursday, City Councilman Thomas Smigiel said in a social media post.

— Mary Gilbert, CNN Money, 24 Sep. 2026
About 40 miles south of Newcomb in the small community of Mexican Springs, flooding made many dirt and gravel roads impassable, stranding some families and leaving others unable to reach home.

— Jessica Hill, Los Angeles Times, 19 Sep. 2026

Definition of impassable

Adjective

Dropped catches from Steve Smith, Green and Travis Head ensured yesterday's brief rally in the field fizzled out and allowed Bangladesh to bat itself into an almost impregnable position.

— ABC News, ABC News, 14 Aug. 2026
The shell of a good- sized adult abalone is more or less impregnable to most of the kelp forest’s predators, too strong and too thick for penetration.

— Literary Hub, Literary Hub, 29 July 2026

Definition of impregnable

Browse Nearby Words

impermanent

impermeable

impermissible

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Cite this Entry

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“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 2 Oct. 2026.

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Synonyms of impermeable

adjective

Example Sentences

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