unquenchable

adjective

un·​quench·​able ˌən-ˈkwen-chə-bəl 

: unable to be quenched

an unquenchable flame

especially : not capable of being satisfied, quelled, or discouraged

an unquenchable thirst/desire

unquenchable optimism

unquenchably

ˌən-ˈkwen-chə-blē 

adverb

Synonyms of unquenchable

• insatiable
• urgent
• quenchless
• avid
• inextinguishable

Examples of unquenchable in a Sentence

from a very early age she displayed an unquenchable curiosity about the natural world

Recent Examples on the Web

Beloved returns as an unquenchable force demanding more and more nourishment and attention from Sethe. — Literary Hub, 13 Oct. 2026

The story follows the transformation of Adriana (Colin), a woman shattered by a terrible murder and who discovers the strength to start over, driven by an unquenchable thirst for justice. — Rafa Sales Ross, Variety, 11 Oct. 2026

In other words, pretty much all of the hype around Geese was legit, believe it or not — a product of the same apparently unquenchable drive to talk about this band that, in turn, produced the backlash that followed. — Simon Vozick-Levinson, Rolling Stone, 10 Sep. 2026

He’s known for his booming, borderline hits, but his unquenchable thirst to dole out those hits often leaves him badly out of position. — Shayna Goldman, New York Times, 1 July 2026

Word History

First Known Use

14th century, in the meaning defined above