unsustainable
adjective
un·sus·tain·able
ˌən-sə-ˈstā-nə-bəl 
: not capable of being prolonged or continued : not sustainable
unsustainable agricultural practices
unsustainable growth
Examples of unsustainable in a Sentence
Recent Examples on the Web
Bilton and Weiss felt Pelley had created an unsustainable working environment.
—
Brian Steinberg, Variety, 3 June 2026
This practice is unsustainable for long-duration missions to the Moon or Mars, where resupply missions will be limited.
—Chris Young, Interesting Engineering, 2 June 2026
Meaning, are companies seeing incredible profits from AI that will ultimately prove unsustainable?
—Zev Fima, CNBC, 2 June 2026
But this pace is simply unsustainable.
—Mitch Bannon, New York Times, 2 June 2026
See All Example Sentences for unsustainable
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Brian Steinberg, Variety, 3 June 2026
This practice is unsustainable for long-duration missions to the Moon or Mars, where resupply missions will be limited.
—Chris Young, Interesting Engineering, 2 June 2026
Meaning, are companies seeing incredible profits from AI that will ultimately prove unsustainable?
—Zev Fima, CNBC, 2 June 2026
But this pace is simply unsustainable.
—Mitch Bannon, New York Times, 2 June 2026
See All Example Sentences for unsustainable
Cite this Entry
“Unsustainable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsustainable. Accessed 4 Jun. 2026.
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