impregnable

adjective

im-ˈpreg-nə-bəl How to pronounce impregnable (audio)
Definition of impregnablenext
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

Synonyms & Similar Words

Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of impregnable The multiple attacks could be a major victory for the jihadis in a city seen as impregnable, despite attackers often targeting troops and villages on the outskirts of the city. — Haruna Umar, Los Angeles Times, 17 Mar. 2026 The multiple attacks could be seen as a major victory for the jihadis in a city seen as impregnable despite the jihadis often targeting troops and villages on the outskirts of the city. — ABC News, 16 Mar. 2026 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 See All Example Sentences for impregnable
Recent Examples of Synonyms for impregnable
  1. invincible
  2. impervious
  3. invulnerable
  4. close
  5. unconquerable
  6. dense
  7. insurmountable
  8. impenetrable
Adjective
  • That summer, the Warriors responded by signing Kevin Durant and morphing from juggernaut to invincible.
    — Joseph Dycus, Mercury News, 24 July 2026
  • With the franchise’s trademark blend of extreme gore and dark humor, the Evil Dead backstory centers on the ancient Book of the Dead that unleashes supernatural evil forces and twists victims into sadistic, shape-shifting, near-invincible monsters.
    — Brady MacDonald, Oc Register, 21 July 2026
Definition of invincible
Adjective
  • Properties with at least five acres of impervious surface will be subject to the rules.
    — Ian James, Los Angeles Times, 29 July 2026
  • Since her move, Hampton has established herself as England’s No 1 and one of the WSL’s most impervious goalkeepers.
    — Megan Feringa, New York Times, 28 July 2026
Definition of impervious
Adjective
  • Google also doesn’t claim that SynthID is invulnerable—the original paper on the technology notes that the watermark is not intended to withstand adversarial attacks.
    — ArsTechnica, ArsTechnica, 29 July 2026
  • For Ross, this gives the character a steadier presence than the standard invulnerable operative often found in genre fiction.
    — Matt Emma, USA Today, 29 July 2026
Definition of invulnerable
Adjective
  • Accessibility for those with mobility impairments There will be a closer drop-off point to the main building, while the longer pathway will allow for wheelchair access, with two bandas accessible via ramps.
    — Condé Nast, Condé Nast Traveler, 27 July 2026
  • Here’s a closer look at how time in the water can benefit your health.
    — Patricia Neligan, AJC.com, 27 July 2026
Definition of close
Adjective
  • The Spurs led for more minutes than the Knicks and built seemingly unconquerable leads.
    — Dana O’Neil, CNN Money, 14 June 2026
  • Ryan Borucki relieved him, the White Sox scored twice more, and the Giants faced an unconquerable deficit as baseball’s lowest-scoring team.
    — Cam Inman, Mercury News, 23 May 2026
Definition of unconquerable
Adjective
  • Out in the wild, turbulent air swirls these plumes into a chaotic, broken landscape—dense chemical filaments laced through long stretches of clean air.
    — Jacek Krywko, ArsTechnica, 1 Aug. 2026
  • This breakthrough could eventually lead to smaller, denser, and more efficient photonic chips for communications, quantum technologies, and optical computing.
    — Rupendra Brahambhatt, Interesting Engineering, 1 Aug. 2026
Definition of dense
Adjective
  • But each alternative scenario encountered insurmountable theoretical limitations.
    — Robert Lea, Space.com, 29 July 2026
  • Or maybe the next generation of the monarch’s friends will find further innovations to defeat problems that now seem insurmountable.
    — Vann R. Newkirk II, The Atlantic, 28 July 2026
Definition of insurmountable
Adjective
  • At a time when Disney’s once-impenetrable Marvel Cinematic Universe has been exhibiting concerning signs of wear and tear at the box office, Spider-Man is getting more and more powerful.
    — Rebecca Rubin, Variety, 28 July 2026
  • The Phalanx was composed of men who moved and fought as one cohesive unit, creating an impenetrable wall of interlocking shields.
    — Steve Muscato, Forbes.com, 27 July 2026
Definition of impenetrable

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impregnability
impregnable
impregnableness
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Cite this Entry

“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 2 Aug. 2026.

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