Thesaurus.com
Dictionary.com
Definitions

unsustainable

[uhn-suh-stey-nuh-buhl] / ˌʌn səˈsteɪ nə bəl /
ADJECTIVE
not able to be supported in the future
Synonyms
Antonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The commission found that with government cuts forecast in the coming years, councils risked "becoming financially unsustainable".

From BBC • Jun. 11, 2026

Last month, state cybersecurity chiefs warned lawmakers that AI-enabled discovery tools create unsustainable pressure on state networks as patching windows shrink to near zero.

From The Wall Street Journal • Jun. 10, 2026

She quickly acknowledged that the cost of hotel and motel rooms was financially unsustainable and would require the city to purchase its own temporary housing facilities.

From Los Angeles Times • May 27, 2026

The current way of waging war is becoming increasingly unsustainable for the Russian state, especially as the country’s economic troubles make it more difficult to find money to sign up new recruits.

From The Wall Street Journal • May 23, 2026

Thus language-games do not simply succeed, progress, pay, or prove their worth; they can also become unsustainable if the facts change.

From "The Invention of Science" by David Wootton



Vocabulary lists containing unsustainable


Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "unsustainable" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com