unsustainable

[ uhn-suh-stey-nuh-buhl ]

adjective

1. not sustainable; not to be supported, maintained, upheld, or corroborated.

Other Words From

• unsus·taina·bly adverb

Word History and Origins

Origin of unsustainable¹

1670–80; un- ¹ + sustainable ( def )

Example Sentences

They claim demand for electric cars simply isn’t high enough yet, forcing them to offer unsustainable discounts in an effort to meet their targets.

From BBC

Edinburgh University has warned staff it expects to make job cuts in response to “unsustainable” funding.

From BBC

After coming to power in May 2023, President Bola Tinubu said the subsidy was unsustainable and suddenly cut it - pump prices immediately tripled.

From BBC

In a letter with over 200 signatories, hospitality bosses last week told the chancellor the industry was disproportionately impacted by the "unsustainable" tax hike.

From BBC

He maintains that his work always arose from a genuine concern that more people will place an unsustainable burden on the planet.

From Salon

Related Words

• unsuitable
• untenable