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
France believed its Maginot Line of fortresses was impregnable – until the Germans simply went around it.
—
New Atlas, 19 Feb. 2026
By now, Bondi’s playbook at these hearings is both familiar and seemingly impregnable.
—Ruth Marcus, New Yorker, 12 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
New Atlas, 19 Feb. 2026
By now, Bondi’s playbook at these hearings is both familiar and seemingly impregnable.
—Ruth Marcus, New Yorker, 12 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
-
Cox always had a chip on his shoulder, but also seemed invincible — and fearless.—
Michael Schneider,
Variety,
9 Apr. 2026
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The Spurs were starting to seem invincible with him in the lineup.—
Bennett Durando,
Denver Post,
5 Apr. 2026
Adjective
-
There are precious few roads, and nothing is impervious to the whims of weather.—
Tribune News Service,
Baltimore Sun,
16 Mar. 2026
-
This plant can grow as tall as eight feet and is impervious to drought.—
Joshua Siskin,
Oc Register,
14 Mar. 2026
Adjective
-
Still, like any good soldier, Meredith wasn’t going to be discouraged by a bunch of invulnerable avian tanks.—
Tom Hawking,
Popular Science,
25 Feb. 2026
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That is partly because no other power had enjoyed America’s unique circumstances—largely invulnerable to foreign invasion, because of its strength and its distance from the other great powers, and thus able to deploy force thousands of miles from home without leaving itself at risk.—
Robert Kagan,
The Atlantic,
18 Jan. 2026
Adjective
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After entering the game tied at 3 in the ninth, Mets closer Devin Williams allowed two runs in a disastrous final frame to fall to the Twins 5-3 and record their 12th loss in a row, their longest streak since 2002.—
James O'Connell,
New York Daily News,
22 Apr. 2026
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Two Southwest Airlines jets got dangerously close near Nashville on Saturday, triggering collision alarms.—
Aaron Cooper,
CNN Money,
21 Apr. 2026
Adjective
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The seemingly unconquerable fig butterwort (Ficaria verna) invades lowland valleys where seasonal floods carry little broken off bits downstream to sprout anywhere and everywhere.—
Paul Cappiello,
The Courier-Journal,
15 Aug. 2025
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Mountains as towering, imposing and seemingly unconquerable landscapes have been metaphorically linked to power and challenge.—
Jenny Hall,
CNN Money,
14 May 2025
Adjective
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The 5,000-square-foot store and gallery will benefit from the street’s dense foot traffic and its proximity to the Museum of Contemporary Art and other cultural institutions.—
Brian J. Rogal,
Chicago Tribune,
21 Apr. 2026
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Mussels, for instance, create strong underwater adhesives and fibers through dense protein droplets.—
Alexandra Harrell,
Footwear News,
20 Apr. 2026
Adjective
-
The sticking points ahead of a US-Iran deal less resemble insurmountable hurdles, and more smaller details of pride and positioning.—
Nick Paton Walsh,
CNN Money,
15 Apr. 2026
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Michigan, obviously, is the toughest foe that Hurley has faced on this stage, and may have insurmountable size, but don’t discount how difficult UConn is to game plan for on a single day’s rest.—
The Athletic College Basketball Staff,
New York Times,
7 Apr. 2026
Adjective
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Clearly, Villeneuve knows how to turn an impenetrable and famously difficult literary material into something truly cinematic and sweeping.—
Brent Lang,
Variety,
15 Apr. 2026
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McKellen can make a terrific meal out of just a few grunts and groans, spending whole scenes mumbling about nothing in particular; meanwhile, Coel comes across as impenetrable, yet alluringly so.—
David Sims,
The Atlantic,
10 Apr. 2026
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 23 Apr. 2026.
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