How to Use impenetrable in a Sentence

impenetrable

adjective
  • The fort's defenses were thought to be impenetrable.
  • But back in the day, that void would have looked as impenetrable as a dense fog bank.
    — Lacy Schley, Discover Magazine, 26 Nov. 2018
  • The show had felt like this impenetrable wall to get through.
    — Hilton Dresden, The Hollywood Reporter, 25 June 2022
  • But great ear buds — even ones tiny enough to sit in your ears — don’t have to be impenetrable.
    — Washington Post, 8 Oct. 2019
  • With time, trees even grew in the impenetrable ditch.
    — Steven Franck, San Diego Union-Tribune, 9 Sep. 2025
  • Tokyo, like all places, is impenetrable to those who don’t take the time to learn its ways on their own terms.
    — Daniel D'addario, Variety, 4 Apr. 2022
  • The border has been closed and made impenetrable in the movie.
    — Los Angeles Times, 2 Sep. 2021
  • But in time, clouds came to seem impenetrable and rain inevitable.
    — Washington Post, 16 Jan. 2021
  • Inside, the gem is housed in a glass case that is also an impenetrable vault.
    — Beth Py-Lieberman, Smithsonian Magazine, 26 Sep. 2023
  • Which may be true, but the right-wing bubble isn’t nearly as impenetrable as the one on the left.
    — Christian Schneider, National Review, 8 Feb. 2024
  • The jungle is wet and muddy and at times can seem impenetrable.
    — Tom Stienstra, SFChronicle.com, 11 Oct. 2019
  • The safe room should be as impenetrable as possible from the wind.
    — Howard Cohen, miamiherald, 8 Sep. 2017
  • The layer of cheese shouldn’t be thick and impenetrable, and the sauce should be peeking through the cheese.
    — Alex Delany, Bon Appetit, 6 June 2018
  • The Sailors took no chances this time, putting up an impenetrable blocking wall in the third and fourth sets.
    — Andrew Turner, latimes.com, 24 Mar. 2018
  • So what makes your wall impenetrable for the people who really want to climb it?
    — Fox News, 14 Mar. 2018
  • In this archetype, the leader is a stoic force—strong, steady, and impenetrable.
    — Julian Hayes Ii, Forbes, 24 Mar. 2025
  • Gobert played some of his most impenetrable defense in the post and on the perimeter.
    — Bennett Durando, The Denver Post, 15 May 2024
  • Ahead, an impenetrable tangle of pine forest that's home to all manner of bird and beast.
    — Arati Menon, Condé Nast Traveler, 10 Nov. 2024
  • Special run-flat tires, a new thing at the time, finish off the impenetrable visage.
    — Josh Max, Forbes, 17 Jan. 2025
  • As good as the results may be, the process a computer takes to get those results are impenetrable to you and me.
    — Eric Limer, Popular Mechanics, 17 May 2017
  • The exact appeal of a cult can be impenetrable to outsiders, and even to its ex-members.
    — Jessica Winter, The New Yorker, 14 June 2023
  • For two seasons the Queen has worn a somewhat impenetrable mask.
    — Helena Andrews-Dyer, Washington Post, 5 May 2023
  • The world behind its shiny black doors had changed forever, in the instant, but its façade was impenetrable.
    — Steffie Nelson, Los Angeles Times, 24 Dec. 2021
  • But there’s nothing impenetrable about that film.
    — Zac Ntim, Deadline, 8 Oct. 2025
  • And this didn’t have to look like the impenetrable bubble from the Tokyo and Beijing days.
    — Christa Sgobba, SELF, 2 Aug. 2024
  • Though the foliage was almost impenetrable, down here the air was warm and the long underwear had been left behind.
    — Susan Casey, Field & Stream, 6 Dec. 2020
  • In the end, there was nothing del Potro could do to break down Djokovic, the most impenetrable man in tennis.
    — Tom Perrotta, WSJ, 9 Sep. 2018
  • For 82 games and three-plus playoff rounds, the bunker remained impenetrable.
    — Kristian Winfield, New York Daily News, 9 June 2026
  • Make their books so impenetrable that, by the time anyone finds the holes in Accra, the bank is an indomitable force, too big to fail.
    — Amanda Whiting, Vulture, 23 Feb. 2026
  • The leaves were employed as an impenetrable thatch for dwellings, their hard fibers were used to produce strong cords, and the thorns were made into pins and needles.
    — Janet Marinelli, Wired, 19 Feb. 2022

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'impenetrable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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