unsustainable
[ uhn-suh-stey-nuh-buh l ]
/ ˌʌn səˈsteɪ nə bəl /
adjective
not sustainable; not to be supported, maintained, upheld, or corroborated.
Origin of unsustainable
1670–80;
un-1 +
sustainable
OTHER WORDS FROM unsustainable
un·sus·tain·a·bly, adverbWords nearby unsustainable
unsurmountable,
unsurpassed,
unsurprised,
unsuspected,
unsuspecting,
unsustainable,
unswathe,
unswear,
unsweetened,
unswerving,
unsympathetic