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
-
Editor’s picks The world itself is lively, if not exactly dense.—
Christopher Cruz,
Rolling Stone,
6 June 2025
-
In Puerto Rico earlier in the week, the cloud was dense and caused hazy skies, according to the National Weather Service in San Juan.—
Jeanine Santucci,
USA Today,
5 June 2025
Adjective
-
Denim shifts toward a mysterious direction in Blooming Darkness.—
Angela Velasquez,
Sourcing Journal,
27 May 2025
-
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
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 realization was emotional as the two had developed a tight bond.—
Angela Andaloro,
People.com,
3 June 2025
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For wineries accustomed to tight quality control, the conditions are difficult to navigate.—
Rachel King,
Forbes.com,
3 June 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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On Thursday, May 29, the 20-year-old shared a cryptic message on Instagram Stories.—
Catherine Santino,
People.com,
30 May 2025
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Before Tessitore and Barrett could finish arguing, the screen cut out to a cryptic promo from Uncle Howdy, who teased coming after the Tag Team Titles.—
Alfred Konuwa,
Forbes.com,
30 May 2025
Adjective
-
In a life-or-death emergency, voice signals might fade or be unintelligible; Morse code could punch through static and bad weather.—
Laurie Gwen Shapiro,
New Yorker,
2 June 2025
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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
Adjective
-
Its thick plastic outer casing is impervious to flex.—
PC Magazine,
PC Magazine,
28 May 2025
-
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 10 Jun. 2025.
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