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Word of the Day Tuesday, June 9, 2026

unsustainable

/ənˈsʌstɛnəbəl/ adjective · British & US
Valid in UKValid in US
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What does unsustainable mean?

adjective

Not able to be maintained or supported in the long term; not sustainable.

Example

"The company's business model is unsustainable due to high production costs."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for unsustainable

Antonyms of unsustainable

Rhymes with unsustainable

Etymologically related