Meaning & use
unsustainable
Unable to be maintained or continued at the current rate without causing harm or running out.
See it in a sentence
Cutting down the forest at this rate is environmentally unsustainable.
The company's debt levels became unsustainable within just two years.
A note on using this word
Unsustainable is common in discussions of environmental resources and finances, describing a practice that will eventually collapse or fail.
Words with a similar meaning
untenableunviable
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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