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

Synonyms & Similar Words

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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 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 Dry waterproofing technology, which is basically like an invisible, impermeable sock liner. — Olivia Young, Travel + Leisure, 29 May 2026 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 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
  • Properties with at least five acres of impervious surface will be subject to the rules.
    — Ian James, Los Angeles Times, 29 July 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
Definition of impervious
Adjective
  • With patience and selectivity, a tight budget can still open up the universe.
    — Damian Peach, Space.com, 4 Aug. 2026
  • Small prey, with smaller bodies, can make abrupt, tight turns.
    — Rachel Sargent Mirus, Hartford Courant, 3 Aug. 2026
Definition of tight
Adjective
  • Conditions that are too cold might delay proofing or rising, resulting in a super-dense loaf.
    — Karla Walsh, Better Homes & Gardens, 9 Aug. 2026
  • Local authorities did not say how the captives were rescued from the dense, expansive forest of the Kainji Lake National Park.
    — ABC News, ABC News, 8 Aug. 2026
Definition of dense
Adjective
  • The images her sister captured after the strike show the trajectory of the projectile, which ripped through floor after floor, and left a gaping hole covered in a thick layer of white dust.
    — Ava Bambuck, CNN Money, 6 Aug. 2026
  • Spread the vanilla Greek yogurt into an even layer, about ½ inch thick.
    — Sharon Lawson, CBS News, 6 Aug. 2026
Definition of thick
Adjective
  • Girls’ Generation, currently eight members, can be taken as a closer parallel of the same story.
    — Hannah Abraham, Forbes.com, 10 Aug. 2026
  • Messi’s close friend and international teammate, Rodrigo De Paul, captained the squad in his absence.
    — Avi Creditor, New York Times, 9 Aug. 2026
Definition of close
Adjective
  • The pair will share the screen with Will Smith and AnnaSophia Robb, who play two FBI agents investigating a seemingly impossible murder within the impenetrable walls of a maximum-security prison.
    — Matt Grobar, Deadline, 7 Aug. 2026
  • There was a metal gate rolled out making the front portion of the plane an impenetrable fortress.
    — David Hookstead OutKick, FOXNews.com, 7 Aug. 2026
Definition of impenetrable
Adjective
  • Regardless, numerous roads remain flooded and impassible, including East Pine Street, Riverside Drive, Westfield Road, and Welcome Baptist Church Road.
    — NC Weather Bot, Charlotte Observer, 2 Aug. 2026
  • Neighbors say the road sometimes becomes impassable during floods, which could leave visitors stranded at the park.
    — John Moritz, Hartford Courant, 1 Aug. 2026
Definition of impassable
Adjective
  • 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
  • As recidivist would-be escapees, de Boeldieu, Marechal, and Rosenthal are transferred to an impregnable medieval fortress, commanded by Captain von Rauffenstein, now burnt, broken in body, and wearing a neck brace.
    — Thomas Doherty, HollywoodReporter, 18 July 2026
Definition of impregnable

Browse Nearby Words

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 11 Aug. 2026.

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