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

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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

But she is locked in a tight race against Tejano musician Bobby Pulido.

— Hailey Bullis, The Washington Examiner, 19 Sep. 2026
Over a tight five-day timeline — as Marnus and Ilse finish school ahead of the December holidays, and the family prepares for their summer vacation — these various tensions impact one another in tacit but perhaps terminal ways.

— Guy Lodge, Variety, 19 Sep. 2026

Definition of tight

Adjective

Rings are not always uniform, and JWST might simply have cut through a denser clump.

— Jacek Krywko, ArsTechnica, 19 Sep. 2026
Starting with what is often called the Arab Spring and ending with the Black Lives Matter protests that followed George Floyd’s murder in 2020, the demonstrations—dense, synchronized, and persistent—dwarfed older, briefer moments of global protest.

— Rachel Nolan, The New York Review of Books, 19 Sep. 2026

Definition of dense

Adjective

Among the most destructive munitions in Western military arsenals, an MK-84 explosion sends metal fragments in every direction for thousands of feet, can rip through metal and thick concrete, and often creates large craters in the earth.

— Arkansas Online, Arkansas Online, 16 Sep. 2026
Opt in for thick, buttery Grandma pies for a true taste of Brooklyn.

— Condé Nast, Condé Nast Traveler, 16 Sep. 2026

Definition of thick

Adjective

With millions of ballots soon to flood mailboxes, people are paying closer attention.

— Steve Bousquet, Sun Sentinel, 19 Sep. 2026
According to The Irish Star, the POTUS’ close relationship with his executive assistant, Natalie Harp, has further strained his connection with Melania.

— StyleCaster Editors, StyleCaster, 19 Sep. 2026

Definition of close

Adjective

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
For most of our history as a country, and certainly in the post-World War II nuclear era, our borders felt impenetrable.

— Michael Silver, New York Times, 11 Sep. 2026

Definition of impenetrable

Adjective

The floating schools were a response to a longstanding local problem of seasonal floods and impassable, muddy roads that kept children from reaching conventional schools.

— Ali Asif Shawon, NPR, 5 Sep. 2026
Many trees will fall, roads may become impassable and power and water could be unavailable for days or weeks.

— Janet Loehrke, USA Today, 1 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 20 Sep. 2026.

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Synonyms of impermeable

adjective

Example Sentences

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