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
Which explains couldn’t: if Meta had ever been a monopoly, there’s no way its shareholders would have ever allowed $70 billion in new spending meant to expand an already impregnable moat.
—
John Tamny, Forbes.com, 21 Jan. 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
One of the grandest occasions in golf was in 1930, when the great Bobby Jones won the British Amateur at St. Andrews and then captured the claret jug at Royal Liverpool on his way to winning the Grand Slam of that era — the impregnable quadrilateral, as it was called.
—Doug Ferguson, Chicago Tribune, 16 July 2025
See All Example Sentences for impregnable
John Tamny, Forbes.com, 21 Jan. 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
One of the grandest occasions in golf was in 1930, when the great Bobby Jones won the British Amateur at St. Andrews and then captured the claret jug at Royal Liverpool on his way to winning the Grand Slam of that era — the impregnable quadrilateral, as it was called.
—Doug Ferguson, Chicago Tribune, 16 July 2025
See All Example Sentences for impregnable
Recent Examples of Synonyms for impregnable
Adjective
-
Russia's latest territorial losses shows that far from being invincible, Putin and his army are beginning to experience real failures in terms of capability and resources.—
Efrat Lachter,
FOXNews.com,
24 Feb. 2026
-
Pro athletes aren’t invincible.—
Scott Fowler,
Charlotte Observer,
19 Feb. 2026
Adjective
-
Flooding is exacerbated by increasing the impervious area.—
Chicago Tribune,
Chicago Tribune,
2 Mar. 2026
-
But as the cold persisted into the next week and then the one following, a new test emerged, one more impervious to a communications strategy.—
Molly Fischer,
New Yorker,
19 Feb. 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
-
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
-
The most appropriate action is to drive to the closest shelter available.—
KANSAS CITY STAR WEATHER BOT,
Kansas City Star,
11 Mar. 2026
-
The virus can spread through close contact with someone who is infected, such as by sharing food or eating utensils.—
Jasmine Mendez
Follow,
Los Angeles Times,
11 Mar. 2026
Adjective
-
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
-
Mountains as towering, imposing and seemingly unconquerable landscapes have been metaphorically linked to power and challenge.—
Jenny Hall,
CNN Money,
14 May 2025
Adjective
-
If not eaten immediately, the lovely creaminess becomes a dense pile of goop with no hope of Cinderella-ing itself back to a luxurious state.—
Nina Moskowitz,
Bon Appetit Magazine,
10 Mar. 2026
-
And in between the mammals is an even denser profusion of bird life.—
Tom Vanderbilt,
Condé Nast Traveler,
10 Mar. 2026
Adjective
-
That would be insurmountable against a lot of teams but especially against the Wildcats, whose only losses this season came back-to-back to Kansas and Texas Tech, and who is no doubt eager to avenge a loss to Houston in the championship game a year ago.—
ABC News,
ABC News,
12 Mar. 2026
-
Kenna is in an unthinkable, seemingly insurmountable position.—
Kate Erbland,
IndieWire,
11 Mar. 2026
Adjective
-
The material was porous and crumbly, allaying fears that the fuel might’ve fused into a diamond-hard mass impenetrable even to drills.—
Yusuke Maekawa,
Bloomberg,
8 Mar. 2026
-
The Arcadis report finds an impenetrable surface cover outlined in the next option, Alternative 5, to be unfeasible due to the site’s topography and other floodplain issues.—
Frederick Melo,
Twin Cities,
8 Mar. 2026
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 14 Mar. 2026.
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