UNSUSTAINABLE Synonyms: 26 Similar and Opposite Words

unsustainable

adjective

Definition of unsustainable

as in unsupportable

Related Words

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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 unsustainable Still, there’s evidence that the AI buildout could be on an unsustainable path. — David Goldman, CNN Money, 5 Nov. 2026 That could unnerve bond investors, who are worried that Washington is on an unsustainable fiscal trajectory, Ed Yardeni, president of Yardeni Research, said in a note to investors. — Mary Cunningham, CBS News, 3 Nov. 2026 The coastal recession is rendering some seaside regions structurally unsustainable, sending beach towns scrambling to quarry replacement sand. — Cindy Carcamo, Christian Science Monitor, 2 Nov. 2026 Small employers will be forced to either absorb these unsustainable expenses, reduce benefits or drop coverage altogether. — Glynn Frechette, Forbes.com, 30 Oct. 2026 See All Example Sentences for unsustainable

Recent Examples of Synonyms for unsustainable

Adjective

Currah’s opinion piece is wrong on the facts, the law, and the science, and reaches unsupportable conclusions.

— Paisley Currah, The New York Review of Books, 18 Dec. 2025
The venerable but troubled outlet has been for sale since its previous owners ran up unsupportable debts and were removed in 2023.

— Tom Chivers, semafor.com, 24 Nov. 2025

Definition of unsupportable

Adjective

The new volume includes valuable findings alongside duplicates, unverifiable submissions and reports lacking enough depth to act on.

— Ido Geffen, Forbes.com, 5 Nov. 2026
The most reliable move when labels feel unverifiable is to buy directly from a farmer or producer who can describe their practices.

— Anne Wolf, Martha Stewart, 26 July 2026

Definition of unverifiable

Adjective

No working of any system or joy gathered from an unprovable satirical angle.

— Sean Joseph OutKick, FOXNews.com, 8 Oct. 2026
Hollywood has long been a petri dish of nasty rumors, and throughout its history, several unproven, or unprovable, salacious stories about movie stars have taken on lives of their own.

— Julian Sancton, HollywoodReporter, 17 Sep. 2026

Definition of unprovable

Browse Nearby Words

unsuspicious

unsustainable

unswathe

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“Unsustainable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsustainable. Accessed 15 Nov. 2026.

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Synonyms of unsustainable

adjective

Example Sentences

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