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 dense
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
Japanese airpower destroyed supposedly impregnable British battle cruisers in the Pacific at the outset of World War II.
—
Michael C. Horowitz, Foreign Affairs, 4 July 2025
Something technical would surely have been appropriate: Which programming language is most vulnerable, which most impregnable?
—Literary Hub, 1 July 2025
Superstar Harmanpreet Kaur's unbelievable 171 not out that destroyed an impregnable Australia in a remarkable semi-final upset was seen as a turning point.
—Tristan Lavalette, Forbes, 15 Oct. 2024
But their defenses are not impregnable.
—David Zipper, Vox, 7 Dec. 2018
See All Example Sentences for impregnable
Michael C. Horowitz, Foreign Affairs, 4 July 2025
Something technical would surely have been appropriate: Which programming language is most vulnerable, which most impregnable?
—Literary Hub, 1 July 2025
Superstar Harmanpreet Kaur's unbelievable 171 not out that destroyed an impregnable Australia in a remarkable semi-final upset was seen as a turning point.
—Tristan Lavalette, Forbes, 15 Oct. 2024
But their defenses are not impregnable.
—David Zipper, Vox, 7 Dec. 2018
See All Example Sentences for impregnable
Recent Examples of Synonyms for impregnable
Adjective
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Even though these spaces feel invincible in the moment, they’re so easily taken away or criminalized.—
Kieran Press-Reynolds,
Pitchfork,
25 June 2025
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Nonetheless, many political observers deemed Sunday’s low turnout an embarrassing setback for a party that had seemed near invincible in its extraordinary march to power since its emergence less than a decade ago.—
Patrick J. McDonnell,
Los Angeles Times,
2 June 2025
Adjective
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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
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It’s already been tested out successfully in dense urban areas.—
Heather Farmbrough,
Forbes.com,
24 July 2025
Adjective
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Even Superman wasn’t invulnerable to Wertham’s criticism.—
Vasilis K. Pozios,
HollywoodReporter,
18 July 2025
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The invulnerable | 2024 | France | Lucas Bacle | While caring for his ailing father, Marcus, 17, has only a few days left to submit the short film needed to apply for his dream film school.—
Matthew Carey,
Deadline,
25 June 2025
Adjective
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Many organizations, particularly in healthcare and pharma, sit on mountains of legacy data that remain impenetrable to the teams who need it most.—
Abigail Stuart,
Forbes.com,
10 July 2025
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Riddle has done that in part by embracing the community that sees her as a way into a complicated and sometimes deliberately impenetrable sport.—
Caoimhe O'Neill,
New York Times,
10 July 2025
Adjective
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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
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The Latin word Invictus means unconquerable or undefeated.—
Lissete Lanuza Sáenz,
StyleCaster,
18 Apr. 2025
Adjective
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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
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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
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Between comparatively high mortgage rates and skyrocketing home prices, the weight of buying a home feels insurmountable for Gen Z and millennials.—
Sydney Lake,
Fortune,
23 July 2025
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Companies that successfully automate their operations while competitors struggle with manual processes will gain compound advantages that may prove insurmountable.—
Josipa Majic Predin,
Forbes.com,
14 July 2025
Adjective
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Several major roads in Montgomery, Prince George’s and Anne Arundel counties in Maryland, as well as in Fairfax County in Virginia, were impassable on Saturday evening.—
New York Times,
New York Times,
20 July 2025
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North Plainfield, New Jersey, Mayor Lawrence La Ronde told CNN affiliate WABC that emergency crews rescued people from at least 30 homes, after streets became completely flooded and were impassable.—
Luke Snyder,
CNN Money,
14 July 2025
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 3 Aug. 2025.
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