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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Antonyms & Near Antonyms
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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Example Sentences
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Recent Examples of impenetrable
If love is a conspiracy of two, impenetrable to outsiders, Iago finds a way to pierce through, seeding doubt about Desdemona in Othello.
—
Maya Singer, Vogue, 27 Feb. 2025
The gold depository at Fort Knox has a reputation for being impenetrable, which has gained it a place in popular culture.
—CBS News, 21 Feb. 2025
Numerous incidents demonstrate that Macs are not impenetrable, and a new one has recently been added to the list.
—Kurt Knutsson, Cyberguy Report, Fox News, 15 Jan. 2025
Artificial intelligence is even peering through the most impenetrable of artifacts: ancient, charred scrolls that are too delicate to be unfurled.
—Ashley Strickland, CNN, 8 Feb. 2025
See All Example Sentences for impenetrable
Maya Singer, Vogue, 27 Feb. 2025
The gold depository at Fort Knox has a reputation for being impenetrable, which has gained it a place in popular culture.
—CBS News, 21 Feb. 2025
Numerous incidents demonstrate that Macs are not impenetrable, and a new one has recently been added to the list.
—Kurt Knutsson, Cyberguy Report, Fox News, 15 Jan. 2025
Artificial intelligence is even peering through the most impenetrable of artifacts: ancient, charred scrolls that are too delicate to be unfurled.
—Ashley Strickland, CNN, 8 Feb. 2025
See All Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
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Its key appeal comes from its historic center, a dense, buzzy neighborhood that’s full of cafés, restaurants, boutiques, churches, supermarkets, businesses, hotels, homes, and more.—
Kathleen Peddicord,
Forbes,
14 Mar. 2025
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Head to Mill Creek Lake to kayak or fish for bass, bluegill, crappie, and trout in a sunny spot that’s surrounded by imposing cliffs and a dense forest.—
Casey Barber,
Southern Living,
12 Mar. 2025
Adjective
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After his first game since Feb. 26, Porziņģis detailed his long journey back from a mysterious illness.—
Jay King,
The Athletic,
16 Mar. 2025
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Everyone is a suspect, and there’s a lot of buildup to finding out what happened at a fateful St. Patrick’s Day party 15 years prior — especially when Chelsea (Ilana Glazer) makes a mysterious reference to an incident that made the entire school ostracize her.—
Marianne Eloise,
Vulture,
14 Mar. 2025
Adjective
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Upon agreement, their dialogue shifts to a series of sounds incomprehensible to humans.—
Dr. Diane Hamilton,
Forbes,
25 Feb. 2025
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In a twist that’s almost incomprehensible today, the Chinese government even officially adopted the US State Department’s method for reporting air quality.—
Zeyi Yang,
WIRED,
5 Mar. 2025
Adjective
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This prevents dormant accounts with unlimited access from becoming potential security risks over a period of time, ensuring tighter control over permissions.—
Expert Panel®,
Forbes,
11 Mar. 2025
-
Few films have ever induced such immense tonal whiplash while exhibiting such tight formal control over their transformations.—
Siddhant Adlakha,
Variety,
10 Mar. 2025
Adjective
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The underlying labor market remains strong for now, but is not impervious to the effects of tariffs.—
David Faris,
Newsweek,
17 Mar. 2025
-
That kind of confidence seemingly makes the Tritons impervious to shot-making fluctuation.—
Ivan Carter,
San Diego Union-Tribune,
9 Feb. 2025
Adjective
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The Bachelor alum took to social media on Wednesday, March 19, with a cryptic message seemingly responding to her ex-boyfriend Brendan Morais’ hard launch with his new girlfriend Serene Russell.—
Liza Esquibias,
People.com,
21 Mar. 2025
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The episode ends with a cryptic phone call to Luca from a family member, hinting at their ties to the resort.—
Martine Paris,
Forbes,
20 Mar. 2025
Adjective
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Followers criticized TikToker Easton Simpson for using his spot at the Kingdom of the Planet of The Apes premiere to prank the film’s actors by asking unintelligible questions.—
CT Jones,
Rolling Stone,
6 Mar. 2025
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The sometimes unintelligible lyrics roll out over spare acoustic guitar in what sounds like an unfinished demo.—
Gil Kaufman,
Billboard,
16 Jan. 2025
Adjective
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The toughest part involved fishing some stiff, thick wire through a space between the coolant tank and a metal bracket (which the manual warned about).—
Ars Technica,
Ars Technica,
17 Mar. 2025
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Many communities are losing their water sources from glacier melt, while others are seeing local streams discolored and turned toxic by recently exposed rocks full of heavy metals and which were once covered by thick sheets of ice.—
Simeon Tegel,
NPR,
17 Mar. 2025
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 25 Mar. 2025.
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