1
as in dense
impossible to get through or into
the ancient temple was surrounded by vast stretches of impenetrable jungle
Synonyms & Similar Words
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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
This must be key to Trump’s impenetrable calculations.
—
Nick Paton Walsh, CNN Money, 19 June 2025
While no cyber defense is impenetrable, fixating on technical design proves futile when incentives, incompetence and indifference undermine internal controls design, implementation and effectiveness.
—Noah Barsky, Forbes.com, 11 June 2025
And where leadership believes their infrastructure is impenetrable, red teams often walk through the front door with nothing more than confidence and a cover story.
—Jochen Schwenk, Forbes.com, 4 June 2025
To say that this film is impenetrable is an understatement.
—Sophie Monks Kaufman, IndieWire, 22 May 2025
See All Example Sentences for impenetrable
Nick Paton Walsh, CNN Money, 19 June 2025
While no cyber defense is impenetrable, fixating on technical design proves futile when incentives, incompetence and indifference undermine internal controls design, implementation and effectiveness.
—Noah Barsky, Forbes.com, 11 June 2025
And where leadership believes their infrastructure is impenetrable, red teams often walk through the front door with nothing more than confidence and a cover story.
—Jochen Schwenk, Forbes.com, 4 June 2025
To say that this film is impenetrable is an understatement.
—Sophie Monks Kaufman, IndieWire, 22 May 2025
See All Example Sentences for impenetrable
Recent Examples of Synonyms for impenetrable
Adjective
-
Towns and counties now have to pick a handful of ways to create denser, cheaper housing and report on their progress every year.—
Marisa Peñaloza,
NPR,
24 July 2025
-
It’s already been tested out successfully in dense urban areas.—
Heather Farmbrough,
Forbes.com,
24 July 2025
Adjective
-
Years after gaining superpowers from being bombarded by cosmic rays in space, the astronauts-turned-superheroes face a new threat when the mysterious Silver Surfer, Shalla-Bal (Julia Garner), heralds the coming of the world-devouring Galactus (Ralph Ineson).—
Brian Truitt,
USA Today,
26 July 2025
-
More Miguel Rodriguez/Getty Images What's so mysterious about a team playing well?—
Jon Vankin,
MSNBC Newsweek,
26 July 2025
Adjective
-
Her scream resonated with the one in my chest while also being incomprehensible and beyond me.—
Literary Hub,
Literary Hub,
28 July 2025
-
Without answers, the grieving process was incomprehensible.—
Skyler Caruso,
People.com,
24 July 2025
Adjective
-
But the party was especially focused on reforming public finance, calling for strict economy in expenditures and even tighter limits on taxation.—
Joseph Thorndike,
Forbes.com,
21 July 2025
-
Kick your legs in small up-and-down fluttering motions while keeping your lower back flat and abs tight throughout.—
Jakob Roze,
Health,
21 July 2025
Adjective
-
For instance, more construction in an area can lead to more impervious surfaces that retain water or shunt it toward a certain neighborhood.—
Umair Irfan,
Vox,
4 July 2025
-
And even the mighty NFL isn’t impervious to the ravages of demographic drift, although the league’s absolute deliveries of the under-50 set remain the gold standard.—
Anthony Crupi,
Sportico.com,
11 July 2025
Adjective
-
Whether the pair will do more to promote the album than share cryptic corresponding Instagram posts remains to be seen.—
CNN.com Wire Service,
Mercury News,
25 July 2025
-
The news comes days after posters appeared around New York City featuring Roan’s face and a cryptic reference to Aug. 1.—
Stephen Daw,
Billboard,
24 July 2025
Adjective
-
As satire, Next to Heaven is unintelligible, as though someone is universalizing their own hangups and then skewering them for clout.—
Book Marks
June 20,
Literary Hub,
20 June 2025
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Filled with uncanny creatures and unintelligible language, the book's inspiration came, Serafini muses, either from aliens, or his cat.—
David Morgan,
CBS News,
30 May 2025
Adjective
-
Sides of hand-cut fries ($3) were fairly standard, and onion rings ($5) were thick and addictively crunchy.—
Rachel Bernhard,
jsonline.com,
14 July 2025
-
The three-day Tampa conference was thick with criticism of DOJ and disbelief that the president could have let so many people down.—
Shelby Talcott,
semafor.com,
14 July 2025
Cite this Entry
“Impenetrable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impenetrable. Accessed 4 Aug. 2025.
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