UNBREACHABLE Synonyms: 44 Similar and Opposite Words

unbreachable

adjective

Definition of unbreachable

as in inviolable

Related Words

Relevance

Dissimilar Words

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 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

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
In the United States, the idea of free speech as virtually inviolable became mainstream only in the 20th century.

— Paul Quigley, The Conversation, 13 July 2026

Definition of inviolable

Adjective

For more than a decade, India’s leader Narendra Modi has seemed politically unassailable, presiding over a government that has outmaneuvered opponents, dominated public discourse and squeezed the space for dissent in the world’s biggest democracy.

— Rhea Mogul, CNN Money, 28 July 2026
This parcours was conceived to prevent Pogačar from seizing an unassailable lead too early in the race, with just one stage in the high Pyrenees, and the next truly difficult summit finish not reached until Le Markstein on stage 14.

— Jacob Whitehead, New York Times, 26 July 2026

Definition of unassailable

Adjective

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
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

Definition of impregnable

Adjective

Should the Arizona Diamondbacks beat the San Diego Padres later Wednesday evening, their once insurmountable 14-game lead over second place will drop to eight games.

— Ian Miller OutKick, FOXNews.com, 6 Aug. 2026
Ferrand-Prevot won last year with a decisive climb on the Col de la Madeleine, creating an insurmountable gap to her rivals.

— Jessica Hopkins, New York Times, 4 Aug. 2026

Definition of insurmountable

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

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

Browse Nearby Words

unbraids

unbreachable

unbreakable

See all Nearby Words

Cite this Entry

Style

“Unbreachable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unbreachable. Accessed 12 Aug. 2026.

Copy Citation

Synonyms of unbreachable

adjective

Example Sentences

Browse Nearby Words

Cite this Entry

More from Merriam-Webster

Word of the Day

gnomic

Popular in Grammar & Usage

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

7 Pairs of Commonly Confused Words

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Popular in Wordplay

Words from the 'Odyssey'

The Longest Long Words List

It's a Scorcher! Words for the Summer Heat

12 Lovely and Unusual Words for the Natural World

'Gaslighting,' 'Woke,' 'Democracy,' and Other Top Lookups

Popular

A Who’s Who Regarding ‘Who’s’ and ‘Whose’

Words from the 'Odyssey'

The Longest Long Words List

Games & Quizzes