1
as in dense
impossible to get through or into
the ancient temple was surrounded by vast stretches of impenetrable jungle
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2
as in mysterious
being beyond one's powers to know, understand, or explain
the mysteries of that religion are completely impenetrable to outsiders
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3
as in incomprehensible
impossible to understand
the textbook's language is completely impenetrable, at least to me
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4
as in tight
not allowing penetration (as by gas, liquid, or light)
the container of toxic waste has an impenetrable seal to prevent leaks
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Examples Sentences
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Recent Examples of impenetrable
Contractors claimed their prototypes would turn America into an impenetrable fortress.
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Outside Online, 9 Oct. 2024
Norman Reedus promises the 'best hour of Walking Dead ever' on season 2 of Daryl Dixon
No character in The Walking Dead universe is harder to get closer to than Daryl, who locks his heart in a fortress more impenetrable than the Sanctuary.
—EW.com, 19 Sep. 2024
Indeed, there’s something altogether impenetrable about Pavement’s shaggy, brilliant lead man, which may explain some of the fascination the band has held over the years.
—Jordan Mintzer, The Hollywood Reporter, 4 Sep. 2024
The duo forged a close and impenetrable bond that has only strengthened throughout the professional sprinter's career.
—Nasha Smith, Peoplemag, 2 Aug. 2024
See all Example Sentences for impenetrable 
Outside Online, 9 Oct. 2024
Norman Reedus promises the 'best hour of Walking Dead ever' on season 2 of Daryl Dixon
No character in The Walking Dead universe is harder to get closer to than Daryl, who locks his heart in a fortress more impenetrable than the Sanctuary.
—EW.com, 19 Sep. 2024
Indeed, there’s something altogether impenetrable about Pavement’s shaggy, brilliant lead man, which may explain some of the fascination the band has held over the years.
—Jordan Mintzer, The Hollywood Reporter, 4 Sep. 2024
The duo forged a close and impenetrable bond that has only strengthened throughout the professional sprinter's career.
—Nasha Smith, Peoplemag, 2 Aug. 2024
See all Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
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Using the 16-Inch MacBook Pro: The Most Specialized MacBook Primarily a desktop replacement or workstation, the 16-inch MacBook Pro is surprisingly dense if you’re otherwise used to tossing around a lithe MacBook Air.PCMAG, PCMAG, 7 Nov. 2024
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Reading this dense yet miraculously seductive book becomes an experience like Hans Castorp’s interlude on the mountain.George Packer, The Atlantic, 5 Nov. 2024
Adjective
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The film, which sees Ash and his traveling companions Misty and Brock go to a mysterious island where they’re caught up in the ultrastrong legendary Pokémon Mewtwo’s revenge plot against the cruel world that created him, was a high-water mark for Pokémon.James Grebey, Vulture, 9 Nov. 2024
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The deer, knowing by some mysterious means that his would-be slayer is a novice, stands still, looking with amusement at buck fever’s latest victim.Jack O’Connor, Outdoor Life, 6 Nov. 2024
Adjective
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Trump’s speeches at rallies, especially of late, are rambling to the point of being incomprehensible.Richard Behar, Forbes, 31 Oct. 2024
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Their contributions to my life are incomprehensible.Emma Madden, Vulture, 31 Oct. 2024
Adjective
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The company’s markets wagered correctly and controversially in Donald Trump’s favor in bets on who would win the presidential election, even though opinion polls showed a tight race.Sophia Pargas, NBC News, 14 Nov. 2024
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Incumbent Leonel Talavera and her opponent, Vanesa Estrella, are locked in a tight race for Area 5.Alexcia Negrete, Orange County Register, 9 Nov. 2024
Adjective
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The superfluid still rubs against the bucket, but the material is totally impervious to friction until the container reaches a certain rotational speed.Quanta Magazine, Quanta Magazine, 6 Nov. 2024
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This was somewhat fortuitous as the new Soviet T-34 tanks acquired by Ho Chi Minh and the Viet Minh were impervious to the M20 Recoilless Rifle and the Vespa TAP would not have fared well in the jungles of Vietnam.Mike Hanlon, New Atlas, 12 Oct. 2024
Adjective
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Because what Ken was doing at first was really all vibes: the all-black dress code, the grungy photography, the cryptic social media presence.Alphonse Pierre, Pitchfork, 4 Nov. 2024
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As Gamache races to decode an unsettling break-in, a cryptic note, and a hit-and-run, a massive threat lurks.staff, The Christian Science Monitor, 21 Oct. 2024
Adjective
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Clinical notes are now legible and easy to retrieve but often bloated with unnecessary, duplicative, and, at times, unintelligible content.Spencer Dorn, Forbes, 31 Oct. 2024
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Ensure that all content stored and transmitted is encrypted, which means that the data remains unintelligible to unauthorized parties even if it is intercepted.Kris Lahiri, Forbes, 17 Oct. 2024
Adjective
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Inside, instead of a traditional flimsy insole, there’s a removable thick layer of PEBA foam resting directly on the carbon fiber plate.Outside Editors, Outside Online, 11 Nov. 2024
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This was achieved through the installation of a stronger carbon fiber cross-brace between the front shock towers and a thicker undertray bolted beneath the engine.Dan Carney, Popular Science, 7 Nov. 2024
Thesaurus Entries Near impenetrable
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 21 Nov. 2024.
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