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unsustainable

[uhn-suh-stey-nuh-buh l]
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adjective
  1. not sustainable; not to be supported, maintained, upheld, or corroborated.
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Origin of unsustainable

1670–80; un-1 + sustainable
Related formsun·sus·tain·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for unsustainable

untenable, unsuitable, unendurable, unfeasible, brief, fleeting, temporary, implausible, unworkable

Examples from the Web for unsustainable

Contemporary Examples of unsustainable

Historical Examples of unsustainable


Word Origin and History for unsustainable

adj.

1670s, from un- (1) "not" + sustainable.

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Online Etymology Dictionary, © 2010 Douglas Harper