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
The price slump gives buyers a better shot at entering Denver's once seemingly impenetrable market.
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Alayna Alvarez, Axios, 9 Dec. 2024
There’s almost nothing more annoying than when your jewelry gets tangled up into an impenetrable knot, but that headache can be avoided by investing in the Bagsmart Jewelry Travel Organizer, one of our favorites, that’s now on sale for $14.
—Asia London Palomba, Travel + Leisure, 29 Nov. 2024
And Starkey, playing the aloof and impenetrable Allerton, has also earned acclaim for his breakout feature role.
—Kevin Dolak, The Hollywood Reporter, 27 Nov. 2024
Privacy-minded individuals will appreciate the top-tier security innovations this OS comes with, which include biometrics login and encrypted authentication that make your device virtually impenetrable by third parties.
—New Atlas, 19 Nov. 2024
See all Example Sentences for impenetrable 
Alayna Alvarez, Axios, 9 Dec. 2024
There’s almost nothing more annoying than when your jewelry gets tangled up into an impenetrable knot, but that headache can be avoided by investing in the Bagsmart Jewelry Travel Organizer, one of our favorites, that’s now on sale for $14.
—Asia London Palomba, Travel + Leisure, 29 Nov. 2024
And Starkey, playing the aloof and impenetrable Allerton, has also earned acclaim for his breakout feature role.
—Kevin Dolak, The Hollywood Reporter, 27 Nov. 2024
Privacy-minded individuals will appreciate the top-tier security innovations this OS comes with, which include biometrics login and encrypted authentication that make your device virtually impenetrable by third parties.
—New Atlas, 19 Nov. 2024
See all Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
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Parts of the dense, equatorial mainland, as well as the islands that lay off the shore of the nascent capital, Cayenne, would be turned into labor camps and prisons for the most serious criminal offenders in mainland France.Rob Crossan, JSTOR Daily, 13 Dec. 2024
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Photo : Will Myers The swimming pool is positioned below the house, where it’s surrounded by dense greenery.Demetrius Simms, Robb Report, 13 Dec. 2024
Adjective
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President-elect Donald Trump said U.S. government officials, including President Joe Biden, know where the mysterious drone sightings along the East Coast are coming and going from, accusing the leaders without evidence of intentionally keeping those details from the public.Francesca Chambers, USA TODAY, 16 Dec. 2024
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Heinrich, who was filling in for host Shannon Bream, suggested that the mysterious drone situation could possibly be like when the Japanese spied on the U.S. before launching a surprise attack on the Pearl Harbor naval base near Honolulu on December 7, 1941.Raja Krishnamoorthi, Newsweek, 16 Dec. 2024
Adjective
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Yet the sheer volume of healthcare data is nearly incomprehensible.Premier Contributor, Forbes, 11 Dec. 2024
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Disney first unveiled their new CGI design for Stitch at their D23 convention back in August, but Stitch's personality is all in his chaotic movements and incomprehensible alien sounds.Christian Holub, EW.com, 25 Nov. 2024
Adjective
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The company has focused on tight inventory control and full-price sales as part of its omnichannel integration strategy, with inventory down 2.6 percent in the first nine months of the year.Rhonda Richford, WWD, 11 Dec. 2024
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The Biden administration began developing the guidance over the summer, aiming to provide the Trump team with a clear road map for tackling the increasingly tight relationships between some of the United States' biggest adversaries.Gordon G. Chang, Newsweek, 11 Dec. 2024
Adjective
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Two years ago, the U.S. Centers for Disease Control began tracking a sharp rise in cases of extensively drug-resistant (XDR) shigellosis — infections by particular strains of Shigella bacteria that are impervious to most antibiotics.Corinne Purtill, Los Angeles Times, 18 Dec. 2024
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Surface water flooding is especially dangerous for cities with a high proportion of impervious soil coverage and hard surfaces—such as roads and parking lots—that prevent rainwater from being absorbed, increasing the likelihood and impact of flooding.Natalie Donback, TIME, 18 Dec. 2024
Adjective
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The teaser ends on a cryptic note, showing an unknown bloodied woman (played by series newcomer Hilary Swank), running down the side of the road from an unseen threat.Abby Monteil, Them, 9 Dec. 2024
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That math is a bunch of cryptic symbols on a piece of paper.Kelsey Houston-Edwards, WIRED, 8 Dec. 2024
Adjective
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Instead, like 2022’s Smile, the end credits are accompanied by haunting unintelligible voices and sounds throughout.Tim Lammers, Forbes, 17 Oct. 2024
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But when the meeting started, the audio was garbled and unintelligible as city staff made a presentation on the item.Luke Harold, San Diego Union-Tribune, 19 Feb. 2024
Adjective
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Choosing heels with a thicker heel or platform can also provide more support and stability.Thomas G. Moukawsher, Newsweek, 17 Dec. 2024
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My companion ordered a ramen dish of beef, thick noodles and a soy broth (niku udon, $16).Worth Sparkman, Axios, 16 Dec. 2024
Thesaurus Entries Near impenetrable
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 22 Dec. 2024.
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