1
as in invincible
incapable of being defeated, overcome, or subdued
an impregnable fortress that had foiled one invader after another over the centuries
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in impervious
impossible to get through or into
the castle's supposedly impregnable walls
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of impregnable
Even with plentiful supplies, U.S. air-defense systems are not impregnable.
—
Missy Ryan, The Atlantic, 3 Mar. 2026
France believed its Maginot Line of fortresses was impregnable – until the Germans simply went around it.
—New Atlas, 19 Feb. 2026
But their quarterback issues could make those defenses look impregnable.
—Kevin Cusick, Twin Cities, 30 Nov. 2025
OpenAI wasn’t a fortress, wasn’t impregnable.
—Jim Cramer, CNBC, 16 Nov. 2025
See All Example Sentences for impregnable
Missy Ryan, The Atlantic, 3 Mar. 2026
France believed its Maginot Line of fortresses was impregnable – until the Germans simply went around it.
—New Atlas, 19 Feb. 2026
But their quarterback issues could make those defenses look impregnable.
—Kevin Cusick, Twin Cities, 30 Nov. 2025
OpenAI wasn’t a fortress, wasn’t impregnable.
—Jim Cramer, CNBC, 16 Nov. 2025
See All Example Sentences for impregnable
Recent Examples of Synonyms for impregnable
Adjective
-
Of course, honey badgers (Mellivora capensis) aren’t invincible.—
Scott Travers,
Forbes.com,
31 May 2026
-
That was still a sharp commercial comedown for a tentpole that so recently seemed invincible.—
Alison Foreman,
IndieWire,
23 May 2026
Adjective
-
From a tactical standpoint, the fort is unlikely to deter Hezbollah’s new crop of attack drones, which rely on fiber-optic cables and are impervious to jamming.—
Nabih Bulos,
Los Angeles Times,
1 June 2026
-
This proposal involves extremely large impervious surfaces, roofing, pavement, truck courts, loading areas, and supporting infrastructure.—
Sean Krofssik,
Hartford Courant,
27 May 2026
Adjective
-
No one should have to prove themselves by pretending to be invulnerable.—
Teresa Hopke,
Forbes.com,
1 June 2026
-
He-Man has superhuman speed and strength and is invulnerable to most damage.—
Sanat Pai RaikarAll,
Encyclopedia Britannica,
4 May 2026
Adjective
-
There wasn’t much excitement in the building, despite the fact that the game was close until the end.—
Nick Friedell,
New York Times,
17 June 2026
-
He's remained close with the Solari family and has taken Teo Solari under his wing.—
Ryan Hughes,
CBS News,
17 June 2026
Adjective
-
The Spurs led for more minutes than the Knicks and built seemingly unconquerable leads.—
Dana O’Neil,
CNN Money,
14 June 2026
-
Ryan Borucki relieved him, the White Sox scored twice more, and the Giants faced an unconquerable deficit as baseball’s lowest-scoring team.—
Cam Inman,
Mercury News,
23 May 2026
Adjective
-
The videos showed dense crowds waiting in organized lines with little movement.—
Abby Dodge,
CBS News,
17 June 2026
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This is especially important near rushing water, around blind corners and in dense vegetation where sound and visibility are limited.—
Amber Harding OutKick,
FOXNews.com,
16 June 2026
Adjective
-
The thing to remember is that outside of perhaps an insurmountable fear of water, there’s a cruise out there for just about everybody.—
Scott Laird,
Forbes.com,
19 June 2026
-
During Game Four, the Wu-Tang Clan provided the halftime entertainment, taking the stage when the Knicks were down a seemingly insurmountable 29 points.—
Emily Zemler,
Rolling Stone,
16 June 2026
Adjective
-
The Shiatsung Project In a bungalow surrounded by an impenetrable wall, a woman has been raised in isolation by a talking screen mounted on the living room wall, fullfilling her every wish without ever revealing the reasons for its life and existence.—
Kevin Giraud,
Variety,
18 June 2026
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For 82 games and three-plus playoff rounds, the bunker remained impenetrable.—
Kristian Winfield,
New York Daily News,
9 June 2026
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 21 Jun. 2026.
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