UNBREACHABLE Synonyms: 44 Similar and Opposite Words

unbreachable

adjective

Definition of unbreachable

as in inviolable

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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 unbreachable This gap used to be the most unbreachable chasm in marketing. — Jason Barnard, Rolling Stone, 12 Nov. 2025 But there has always been an unbreachable barrier between them and us. — Jeffrey Kluger, Time, 6 Nov. 2025 Dump trucks with tires twice my height rolled past us, ferrying dirt like so many ants, building what Bardini and his fellow-engineers hope will be unbreachable barriers. — James Ross Gardner, The New Yorker, 12 Jan. 2023 Best to arrive at her fort defenseless to have half a chance at challenging her own almost unbreachable defense system. — Bono, Vogue, 5 Nov. 2022 There are times when the gap between Catra and Adora felt unbreachable, and then there's the horrible robotic hivemind stuff in the final season. — Christian Holub, EW.com, 17 Feb. 2022 At the start of Europe’s migration crisis in 2015, the English Channel was regarded as an unbreachable barrier, its shifting currents and volatile weather making any attempt to cross too dangerous. — New York Times, 25 Nov. 2021 This reduces what were once formerly unbreachable barriers to entry to many industries. — Bill Fischer, Forbes, 29 Sep. 2021 The act of crossing over the supposedly unbreachable rivers of race is meant to be shameful. — Nylah Burton, refinery29.com, 26 Sep. 2021

Recent Examples of Synonyms for unbreachable

Adjective

But Washington has said that the principle of free navigation in international waters is inviolable, a stance echoed by Gulf states that rely on the strait for much of their trade.

— Tim Lister, CNN Money, 11 Oct. 2026
Lai, who won election two years ago, and his ruling DPP champion Taiwan’s separate identity from China, a position that frequently angers Beijing, which views the island as an inviolable part of Chinese territory.

— Reuters, NBC news, 19 July 2026

Definition of inviolable

Adjective

On this day in 1931, news broke that Al Capone, Chicago’s untouchable crime boss, had been found guilty.

— Encyclopedia Britannica, Encyclopedia Britannica, 14 Oct. 2026
No one else is untouchable, including Munetaka Murakami, who will be a free agent after ’27, and Kyle Teel, who did not deliver offensively and spent most of the season rehabbing injuries.

— Paul Sullivan, Chicago Tribune, 13 Oct. 2026

Definition of untouchable

Adjective

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, 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, Literary Hub, 29 July 2026

Definition of impregnable

Adjective

The Oscars love sprawling biopics, underdogs and triumphant stories in which seemingly insurmountable obstacles are eventually overcome.

— Clayton Davis, Variety, 8 Oct. 2026
Of course, the Dodger bullpen almost handed the game back to them when Ozzie Albies hit a two-run homer off Tanner Scott in the ninth to close what seemed to be an insurmountable gap.

— Los Angeles Times, Los Angeles Times, 3 Oct. 2026

Definition of insurmountable

Adjective

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
Of course, an extra three-quarters of an inch clearance and some elastic straps do not transform a unibody, front-biased crossover into an invincible rock-crawling monster.

— New Atlas, New Atlas, 9 Oct. 2026

Definition of invincible

Adjective

The Spurs are almost as bulletproof as Oklahoma City on that end of the floor, but the Thunder have a bit more versatility and are more seasoned.

— James L. Edwards III, New York Times, 27 May 2026
Later grants were used to install bulletproof glass around a playground near the street, as well as bulletproof glass in other classroom windows.

— Jeff McDonald, San Diego Union-Tribune, 25 May 2026

Definition of bulletproof

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unbraids

unbreachable

unbreakable

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“Unbreachable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unbreachable. Accessed 21 Oct. 2026.

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Synonyms of unbreachable

adjective

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