unsustainable

unsustainable

[uhn-suh-stey-nuh-buhl]
adjective
not sustainable; not to be supported, maintained, upheld, or corroborated.

Origin:
1670–80; un-1 + sustainable

unsustainably, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  unsustainable
Part of Speech:  adj
Definition:  not able to be maintained or supported in the future, esp. without causing damage or depletion of a resource
Dictionary.com's 21st Century Lexicon
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