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.
Organizations can quickly spiral from having 36% great performers to having 20% or fewer, as the burden on remaining champions becomes unsustainable. Mark Murphy, Forbes.com, 25 June 2025 Domestic production without allied scale is financially unsustainable; allied scale without domestic production is a bridge to nowhere. Damien Ma, Foreign Affairs, 23 June 2025 Loud and Clear also acknowledges the Wall’s unsustainable nature. Noah Eckstein, HollywoodReporter, 23 June 2025 The number one threat to shark species as a whole is unsustainable overfishing practices. ArsTechnica, 20 June 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 5 Jul. 2025.

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