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Definitions

unsustainable

[uhn-suh-stey-nuh-buhl] / ˌʌn səˈsteɪ nə bəl /
ADJECTIVE
not able to be supported in the future
Synonyms
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Apple’s prior strategy of stable pricing boosted iPhone and Mac sales, benefiting high-margin Apple Services, but is now unsustainable.

From Barron's • Jun. 18, 2026

“The U.S. oil export machine is clearly unsustainable, though, and will incrementally slow down as commercial crude inventories are emptying and SPR has been drawn to historic lows,” he says in a note.

From The Wall Street Journal • Jun. 11, 2026

He sees a high rate of capex acceleration that, he said, is unsustainable in 2027, even if overall spending remains high.

From MarketWatch • Jun. 3, 2026

She said the current situation - in terms of funding and need - was unsustainable.

From BBC • May 28, 2026

Thus language-games do not simply succeed, progress, pay, or prove their worth; they can also become unsustainable if the facts change.

From "The Invention of Science" by David Wootton



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