unsustainable

adjective

un·​sus·​tain·​able ˌən-sə-ˈstā-nə-bəl How to pronounce unsustainable (audio)
: not capable of being prolonged or continued : not sustainable
unsustainable agricultural practices
unsustainable growth
unsustainability noun
unsustainably adverb
an unsustainably high rate of growth

Examples of unsustainable in a Sentence

Recent Examples on the Web
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.
At a minimum, subsidizing financially unsustainable facilities is an inefficient use of taxpayer dollars. Ge Bai, Forbes.com, 8 Sep. 2025 At the same time, the steady growth of domestic species reflects our push for productivity but also highlights unsustainable demands for land, feed, and water. New Atlas, 7 Sep. 2025 In recent weeks grosses for the show have slipped considerably, with the weekly take at the end of August sliding to an unsustainable $505,142. Greg Evans, Deadline, 7 Sep. 2025 Their support reflects a growing unease that the college’s current trajectory is unsustainable. Alice Herman, Miami Herald, 6 Sep. 2025 See All Example Sentences for unsustainable

Word History

First Known Use

circa 1677, in the meaning defined above

Time Traveler
The first known use of unsustainable was circa 1677

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Cite this Entry

“Unsustainable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsustainable. Accessed 10 Sep. 2025.

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