1
as in invincible
incapable of being defeated, overcome, or subdued
an impregnable fortress that had foiled one invader after another over the centuries
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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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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
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Rodrigo Duterte once seemed invincible.—
Sheila Coronel,
The Atlantic,
13 Mar. 2026
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Bayern Munich Bayern looked invincible in the first half of 2025-26.—
Anantaajith Raghuraman,
New York Times,
10 Mar. 2026
Adjective
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There are precious few roads, and nothing is impervious to the whims of weather.—
Tribune News Service,
Baltimore Sun,
16 Mar. 2026
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This plant can grow as tall as eight feet and is impervious to drought.—
Joshua Siskin,
Oc Register,
14 Mar. 2026
Adjective
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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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Nevada County’s admission comes as AI programs are under close watch around the globe for introducing incorrect legal references in cases, yet also increasingly offered as tools to help lawyers and judges research and write their briefs, motions and opinions.—
Sharon Bernstein,
Sacbee.com,
1 Apr. 2026
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Catcher Danny Jansen hit a three-run home run in the seventh inning to bust open a close game, and the Rangers held on for an 8-5 road win over the Baltimore Orioles on Tuesday.—
Jim Barnes,
Fort Worth Star-Telegram,
1 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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In cases of near-zero visibility due to dense fog, initiate your hazard lights and locate a secure spot, such as a nearby business parking area, to pull over and come to a halt.—
NC Weather Bot,
Charlotte Observer,
31 Mar. 2026
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Aerix claims the result is a UAV capable of sustained, multidirectional motion—an essential requirement for tracking erratic airborne targets in dense or cluttered environments.—
Jijo Malayil,
Interesting Engineering,
31 Mar. 2026
Adjective
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Orlando is tied for ninth in the Eastern Conference, two games behind the Toronto Raptors for the sixth and final automatic playoff berth with an almost-insurmountable nine-game lead over the Milwaukee Bucks and Chicago Bulls for the final play-in spot.—
Jason Anderson,
Sacbee.com,
26 Mar. 2026
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His five-point lead over Kagiyama and Siao after the short program seemed insurmountable.—
ABC News,
ABC News,
26 Mar. 2026
Adjective
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David Benioff wrote 25th Hour (great), Troy (good), and then Stay, this nearly impenetrable psychological thriller that plays out like The Machinist through a David Lynch filter.—
Roxana Hadadi,
Vulture,
20 Mar. 2026
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To regulators, crypto appeared as one impenetrable blur of internet scam.—
Clara Molot,
Vanity Fair,
17 Mar. 2026
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 1 Apr. 2026.
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