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 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 Alexander the Great conquered it in 332 BCE after building a causeway to what had been considered an impregnable island fortress. — Jane Arraf, NPR, 23 June 2026 On that occasion a team made up of players who had all been born in Haiti shocked an Italy team famed for its impregnable defense. — Laurent Dubois, The Conversation, 10 June 2026 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 See All Example Sentences for impregnable

Recent Examples of Synonyms for impregnable

Adjective

McClellan is particularly interested in examining the contrast between the seemingly invincible figures photographed in the arena and their often precarious lives outside it.

— Robert Lang, Deadline, 19 Oct. 2026
In some Bengali traditions, Vijayadashami rituals include Aparajita Puja, the worship of the goddess in her invincible form, sometimes represented by the butterfly pea plant.

— Encyclopedia Britannica, Encyclopedia Britannica, 9 Oct. 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

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

The world building is easier to understand and less dense than Crescent City, and the tone is also the most indicative of SJM’s writing on the whole; Throne of Glass started as a YA series, then becomes more adult over time.

— Anna Moeslein, Glamour, 24 Oct. 2026
The mollusks can form dense colonies that clog pipes, obstruct water flow and foul boat motors.

— Daniel Hunt, Sacbee.com, 23 Oct. 2026

Definition of dense

Adjective

With Joanne’s no-seriously-this-time decision to convert, previously insurmountable obstacles have melted away.

— Angie Han, HollywoodReporter, 22 Oct. 2026
D’Eriq King, Miami, 2020 King used his arm and his feet to slice and dice the Seminoles en route to an insurmountable 38-3 halftime lead which ended up as a 52-10 win.

— Steve Svekis, Sun Sentinel, 17 Oct. 2026

Definition of insurmountable

Adjective

But the Broncos aren’t just about putting the ball in the back of the net — their defense has allowed just six goals all season and is led by near-impenetrable sophomore goalkeeper Ava de Leest.

— Shaun Goodwin, Idaho Statesman, 17 Oct. 2026
Even top experts have found OpenAI’s proof of blowup to be completely impenetrable.

— Joseph Howlett, Scientific American, 13 Oct. 2026

Definition of impenetrable

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“Impregnable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/impregnable. Accessed 27 Oct. 2026.

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Synonyms of impregnable

adjective

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