un·sus·tain·able | \ ˌən-sə-ˈstā-nə-bəl \

Definition of unsustainable 

: not capable of being prolonged or continued : not sustainable unsustainable agricultural practices unsustainable growth

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Other words from unsustainable

unsustainability \ˌən-sə-ˌstā-nə-ˈbi-lə-tē \ noun
unsustainably \ˌən-sə-ˈstā-nə-blē \ adverb
an unsustainably high rate of growth

Examples of unsustainable in a Sentence

Recent Examples on the Web

But this time, a perfect storm is brewing that has made this process even more unsustainable and even dangerous. Curtis R. Ryan, Washington Post, "Why Jordanians are protesting," 4 June 2018 During the last crisis, easy credit led home prices to rise at an unsustainable pace, leading marginally qualified borrowers to stretch themselves thin. Paul Kupiec And, WSJ, "The Government Creates Another Housing Bubble," 31 May 2018 Our power customers have expressed serious concerns that BPA’s recent pattern of rising costs and rates is unsustainable. George Melloan, WSJ, "Pruitt Leaves a Proud Legacy at the EPA," 11 July 2018 The annual expense — roughly $7,700 for water, on top of the $4,300 billed by the management company — was unsustainable. Nicole Miller-coleman, sandiegouniontribune.com, "As attention on Vinduino grows, so does its market," 7 July 2018 Or its business model may, in the end, be unsustainable. Alissa Wilkinson, Vox, "Why MoviePass is the future — even if it doesn’t survive," 6 July 2018 But that growth has been fed by potentially unsustainable borrowing, both public and private. New York Times, "Turkey’s Economy Is So Hot That It May Face a Meltdown," 10 July 2018 There’s a lot to like about the Braves and Phillies moving forward, but both clubs have been fueled in part by performances that seem unsustainable. Ted Berg, For The Win, "Should the freefalling Nationals look to trade Bryce Harper?," 4 July 2018 Whether that’s unsustainable or ingenious depends on your views of Tesla and Musk in general. Jack Stewart, WIRED, "Tesla Finally Hits Its Model 3 Goal—And Immediately Ups the Ante," 2 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unsustainable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unsustainable

circa 1677, in the meaning defined above

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Last Updated

20 Aug 2018

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Time Traveler for unsustainable

The first known use of unsustainable was circa 1677

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occurring twice a year or every two years

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