impermeable

adjective

(ˌ)im-ˈpər-mē-ə-bəl How to pronounce impermeable (audio)
Definition of impermeablenext
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

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 The spongy material is mostly made of air, yet nearly impermeable to both air and liquid. — Brandee Gruener, Southern Living, 29 Apr. 2026 When a finger contacts an impermeable surface, sweat pores within the ridges release moisture that plasticizes the skin’s keratin layer, which increases friction in turn. — Scott Travers, Forbes.com, 14 Apr. 2026 The outer layer hardened and became impermeable. — Catherina Gioino, Fortune, 11 Apr. 2026 Oil and gas infuse the pores of sandstone; layers of impermeable caprock trap it inside. — Jeffrey Marlow, New Yorker, 5 Apr. 2026 See All Example Sentences for impermeable
Recent Examples of Synonyms for impermeable
  1. impervious
  2. tight
  3. dense
  4. thick
  5. close
  6. impenetrable
  7. impassable
  8. impregnable
Adjective
  • The problem is… their opponents will likely be France, a team that looks impervious.
    — Carl Anka, New York Times, 4 July 2026
  • Overloading Your Washer Even the softest of towels are not impervious to improper laundering, and overloading your washer or using too little water can affect how thoroughly the towels are washed.
    — Louise Parks, Martha Stewart, 30 June 2026
Definition of impervious
Adjective
  • Despite persistent inflation and tighter household budgets, Bankrate analyst Alex Gailey says even small financial adjustments can make a meaningful difference over time.
    — Bonnie Laden, CBS News, 14 July 2026
  • Pilots are launching into a bottleneck already packed with ferries, commercial vessels, and tour boats, while sharing tight overhead airspace with NYPD, news, and helicopters, often with limited visibility.
    — Janet Handal, New York Daily News, 13 July 2026
Definition of tight
Adjective
  • If caught in dense blowing dust, pull off the road, turn off your lights and keep your foot off the brake.
    — CA Weather Bot, Sacbee.com, 10 July 2026
  • The 23 crew members fought through dense fog and dealt with equipment issues after leaving port on June 5.
    — Jennifer Ouellette, ArsTechnica, 10 July 2026
Definition of dense
Adjective
  • And that’s a lot of energy to shed as a vehicle comes blaring back into Earth’s thick atmosphere, a process that typically annihilates objects returning from space unless they are precisely designed to survive the trip.
    — Jackie Wattles, CNN Money, 16 July 2026
  • The water drew back from the house, left a thick, stinking silt across the floor.
    — Literary Hub, Literary Hub, 16 July 2026
Definition of thick
Adjective
  • Even though talks with the Boston Red Sox at last year’s deadline never got close, the confusion provided by an incorrect tweet announcing Ryan’s trade to New England put the pitcher at the top of every trade list before the season even began.
    — Dan Hayes, New York Times, 6 July 2026
  • Ashley Smith is the manager of player engagement for the NFL, and the siblings are close.
    — Pete Grathoff, Kansas City Star, 6 July 2026
Definition of close
Adjective
  • In placing an increasingly expensive and impenetrable wall around Americans and their savings, banks have crucially and understandably developed a substantial amount of knowledge about their customers.
    — John Tamny, Forbes.com, 10 July 2026
  • The package depicts the usual impenetrable forest of the GAS packaging in stark, thorny monochrome.
    — Daniel Bromfield, Pitchfork, 7 July 2026
Definition of impenetrable
Adjective
  • Officials on Saturday morning said the Gilman Trail is impassable and closed near the Edgelawn Avenue east trailhead due to flooding.
    — Aurora Beacon-News, Chicago Tribune, 4 July 2026
  • South of there, at Kessler Air Force Base, several roads became impassible.
    — Kenton Gewecke, ABC News, 16 June 2026
Definition of impassable
Adjective
  • Playing on home soil in a venue that has become an almost impregnable fortress, El Tri will face England in the Round of 16 — in what is arguably the most important match in Mexican soccer history.
    — Carlos Rodriguez, Chicago Tribune, 5 July 2026
  • Alexander the Great conquered it in 332 BCE after building a causeway to what had been considered an impregnable island fortress.
    — Jane Arraf, NPR, 23 June 2026
Definition of impregnable

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impermanent
impermeable
impermissible
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Cite this Entry

“Impermeable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impermeable. Accessed 17 Jul. 2026.

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Nglish: Translation of impermeable for Spanish Speakers

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