IMPREGNABLE Synonyms: 83 Similar and Opposite Words

impregnable

adjective

im-ˈpreg-nə-bəl

Definition of impregnable

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

as in impervious

impossible to get through or into the castle's supposedly impregnable walls

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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 Dropped catches from Steve Smith, Green and Travis Head ensured yesterday's brief rally in the field fizzled out and allowed Bangladesh to bat itself into an almost impregnable position. — ABC News, 14 Aug. 2026 The shell of a good- sized adult abalone is more or less impregnable to most of the kelp forest’s predators, too strong and too thick for penetration. — Literary Hub, 29 July 2026 As recidivist would-be escapees, de Boeldieu, Marechal, and Rosenthal are transferred to an impregnable medieval fortress, commanded by Captain von Rauffenstein, now burnt, broken in body, and wearing a neck brace. — Thomas Doherty, HollywoodReporter, 18 July 2026 Playing on home soil in a venue that has become an almost impregnable fortress, El Tri will face England in the Round of 16 — in what is arguably the most important match in Mexican soccer history. — Carlos Rodriguez, Chicago Tribune, 5 July 2026 See All Example Sentences for impregnable

Recent Examples of Synonyms for impregnable

Adjective

At a Thursday post-election conference organized by the Center for American Progress, Senate Democratic Leader Chuck Schumer said that the people who’d beaten invincible-looking Republicans needed space to vote and govern their way.

— David Weigel, semafor.com, 6 Nov. 2026
That being said, pothos isn’t invincible, and incorrect watering can cause the plant to wilt and die.

— Helena Madden, Martha Stewart, 2 Nov. 2026

Definition of invincible

Adjective

Waititi and co-screenwriter Dahvi Waller seem impervious to that refined sensibility, instead preferring to slather on the quirks, to stunningly charmless effect.

— David Rooney, HollywoodReporter, 20 Oct. 2026
As coastal areas become more developed, impervious surfaces—like roadways, parking lots, rooftops, and sidewalks—have increased.

— Lydia Mansel, Travel + Leisure, 14 Oct. 2026

Definition of impervious

Adjective

Villains like Ted Bundy are imagined to be relatively invulnerable to pain, even in a scenario as basic as stepping barefoot on a shard of glass.

— Paul Bloom, New Yorker, 6 Nov. 2026
Historically, being a strong leader meant being invulnerable and stoic—showing no signs of weakness.

— Krishna Savani, Harvard Business Review, 12 Oct. 2026

Definition of invulnerable

Adjective

Hours after the attack, Prime Minister Donald Tusk said authorities found the bodies of three of the suspect's close family members -- two women and a man -- inside of his home in Ostrowiec Swietokrzyski, a city about 100 miles northeast of Krakow.

— Arkansas Online, Arkansas Online, 8 Nov. 2026
Purdue cut the deficit to 34-29 on Ijeboi's TD run but couldn't get any closer.

— CBS News, CBS News, 8 Nov. 2026

Definition of close

Adjective

But the advent of NIL has turned the gap into an unconquerable chasm.

— Dana O’Neil, CNN Money, 6 Sep. 2026
The rescue party made its way to New York harbor by train, private car, and then two bicycles shared among the three of them—Frank, Sarah’s husband, on one; Sarah and Billo on the other—when shipyard traffic proved unconquerable by automobile.

— Claire Carusillo, Harpers Magazine, 4 Aug. 2026

Definition of unconquerable

Adjective

Consider taking out a few roses in dense beds to make way for a steppingstone path through the blooms.

— Rita Perwich, San Diego Union-Tribune, 7 Nov. 2026
The teams combined atomic-scale simulations with electron microscopy and experiments to see how changes in the two materials could help meet growing demand for denser data storage as AI use expands.

— Atharva Gosavi, Interesting Engineering, 7 Nov. 2026

Definition of dense

Adjective

Democrats won several statewide races in places long considered GOP bastions, including races that were considered insurmountable even weeks ago.

— Charlie Hunt, The Conversation, 4 Nov. 2026
The Constitution’s requirement of a two-thirds super-majority to remove a leader guilty of high crimes and misdemeanors is an all but insurmountable barrier in a country that has become as divided as this one.

— Susan B. Glasser, New Yorker, 3 Nov. 2026

Definition of insurmountable

Adjective

Kramer/Fauci is amazing, but there’s this downtown, opaque, dark stagecraft tradition that is impenetrable.

— Jason P. Frank, Vulture, 5 Nov. 2026
Since then, the president’s personnel and political decisions have reshaped the Senate battleground from what looked like an impenetrable red wall into a toss-up.

— Burgess Everett, semafor.com, 2 Nov. 2026

Definition of impenetrable

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“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 11 Nov. 2026.

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Synonyms of impregnable

adjective

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