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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Example Sentences
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Recent Examples of impenetrable
Like those two men, Combs' power and influence created an impenetrable cocoon of privilege that, prosecutors will argue, insulated him from repercussions while devastating the lives of men and women who stayed largely silent for fear of his reach.
—
Marco Della Cava, USA Today, 6 May 2025
That impenetrable wall made Jackson feel safe, and it got broken.
—Katie Campione, Deadline, 20 Apr. 2025
There are also many systems to contend with that can be slightly impenetrable for newcomers.
—Christopher Cruz, Rolling Stone, 21 Apr. 2025
Most of those minerals are currently buried beneath thick sheets of previously impenetrable ice.
—Mack Degeurin, Popular Science, 10 Apr. 2025
See All Example Sentences for impenetrable
Marco Della Cava, USA Today, 6 May 2025
That impenetrable wall made Jackson feel safe, and it got broken.
—Katie Campione, Deadline, 20 Apr. 2025
There are also many systems to contend with that can be slightly impenetrable for newcomers.
—Christopher Cruz, Rolling Stone, 21 Apr. 2025
Most of those minerals are currently buried beneath thick sheets of previously impenetrable ice.
—Mack Degeurin, Popular Science, 10 Apr. 2025
See All Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
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The cause of the crash also remains unclear, but officials said Friday that the weather alert system and runway lights weren’t working at the airport when the jet attempted to land amid dense fog around 3:45 a.m.—
Brian Niemietz,
New York Daily News,
23 May 2025
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However, researchers observed that after being dispersed by the radiation, the clouds were not dense or large enough to create new stars.—
Kameryn Griesser,
CNN Money,
23 May 2025
Adjective
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Carlton Reid Based on 20 years of observations by NASA’s Hubble Space Telescope, new research sheds light on one of the solar system’s most mysterious planets.—
Ryan Waniata,
Wired News,
27 May 2025
-
Denim shifts toward a mysterious direction in Blooming Darkness.—
Angela Velasquez,
Sourcing Journal,
27 May 2025
Adjective
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Consumers have gotten used to a complicated annual plan selection, confusing industry jargon, and incomprehensible coverage policies.—
Dan Gingiss,
Forbes.com,
11 Apr. 2025
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Every version of it, whether recorded in a studio, live with a full orchestra or only a piano, just rails through absolutely incomprehensible storytelling (something about virgins on a spaceship?) with a lusty guitar and smashed piano chords.—
Shana Naomi Krochmal,
Vulture,
4 Apr. 2025
Adjective
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The 10-member group has been tasked with providing recommendations to the council on ways to relieve the city’s tight housing market.—
Grace Hurt,
Arkansas Online,
22 May 2025
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That might be tricky given New York’s tight cap situation.—
Peter Baugh,
New York Times,
22 May 2025
Adjective
-
Its thick plastic outer casing is impervious to flex.—
PC Magazine,
PC Magazine,
28 May 2025
-
British travelers, however, are largely impervious to currency fluctuations.—
Monica Pitrelli,
CNBC,
13 May 2025
Adjective
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Neither Henry nor Devers have been willing to detail that conversation until now, as Devers finally broke his silence on the discussion with a cryptic four-word message.—
Peter Chawaga,
MSNBC Newsweek,
18 May 2025
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Still, his message ended on a cheerful note that showed the musician seems to be taking the cryptic dismissal in stride.—
Glenn Rowley,
Billboard,
16 May 2025
Adjective
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Decisions once made by human engineers in the future are now being executed by models whose internal logic may be unintelligible even to their creators.—
Anuj Tyagi,
Forbes.com,
16 May 2025
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The words were unintelligible on the video, but Sacramento Police Department officials in a statement summarizing the incident said the man told officers to shoot him.—
Darrell Smith,
Sacbee.com,
15 May 2025
Adjective
-
Its thick plastic outer casing is impervious to flex.—
PC Magazine,
PC Magazine,
28 May 2025
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Look for thicker, buttery formulas with intense moisture.—
Ariana Yaptangco,
Glamour,
27 May 2025
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 4 Jun. 2025.
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