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
Relevance
Antonyms & Near Antonyms
2
as in impervious
impossible to get through or into
the castle's supposedly impregnable walls
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of impregnable
Already fairly impregnable, the Oscars for years has been protected in public view and behind the scenes by a series of federal, regional and local law enforcement groups and departments working in coordination under the auspices of the LAPD.
—
Dominic Patten,
Deadline,
11 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
Dominic Patten,
Deadline,
11 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
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Time and time again in the history of technology, monopolistic industry leaders that long seemed invincible—from Xerox to IBM to AT&T—have proven vulnerable to agile upstarts and technology advances that broke markets wide open by lowering costs, expanding supply and leapfrogging capabilities.
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Legally an adult but still a teenager and finding your footing in the world, vacillating between feeling invincible and feeling minuscule.
Adjective
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Overloading Your Washer Even the softest of towels are not impervious to improper laundering, and overloading your washer or using too little water can affect how thoroughly the towels are washed.
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Crafted from durable high-density polyethylene, these Adirondack chairs are resistant to corrosion and impervious to the elements.
Adjective
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Recent conflicts have demonstrated that no main battle tank is invulnerable.
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In the context of law enforcement, is the perception of Black women as inherently aggressive, threatening, and invulnerable to pain.
Adjective
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With the wrap in front of you, fold up the edge closest to you.
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Because wells in the region are large and close to one another, restarting production will require significant coordination across companies and countries to ensure consistent pressure across multiple wells.
Adjective
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The Spurs led for more minutes than the Knicks and built seemingly unconquerable leads.
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Ryan Borucki relieved him, the White Sox scored twice more, and the Giants faced an unconquerable deficit as baseball’s lowest-scoring team.
Adjective
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Videos of the pyrotechnics display show the pitch filling with tall showers of sparks and dense smoke as dozens of fireworks launched upward.
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The rare Saturday night game at the iconic North Side ballpark started an hour late due to rain, then fog billowed in from the north starting in the second inning and got denser.
Adjective
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Meanwhile, the technological and financial hurdles of fighting the sonic boom appeared insurmountable.
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Both attacks seem to be finding a groove, as just one goal in the second half could feel like an insurmountable advantage in this type of match.
Adjective
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In the venue’s defense, the arena’s near-impenetrable exterior likely had something to do with its appeal.
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Quaintance, in particular, is potentially a monster on defense, and uniting him with Wembanyama might make this team virtually impenetrable.
Cite this Entry
“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 5 Jul. 2026.
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