inexhaustible

adjective

in·​ex·​haust·​ible ˌi-nig-ˈzȯ-stə-bəl How to pronounce inexhaustible (audio)
: not exhaustible: such as
a
: incapable of being used up
inexhaustible riches
b
: incapable of being wearied or worn out
an inexhaustible hiker
inexhaustibility noun
inexhaustibleness noun
inexhaustibly adverb

Examples of inexhaustible in a Sentence

The world's supply of oil is not inexhaustible. He seems to have inexhaustible energy.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Likewise, though Altman claimed in January that nuclear fusion — potentially an inexhaustible source of energy — was only a few years away, the scientists working to bring it about scoff at that timeline (there’s a joke that it’s been 30 years away for the past 60 years). Alex Morris, Rolling Stone, 15 June 2025 Nazzaro continued to describe Panh’s artistic practice as prolific and inexhaustible. Zac Ntim, Deadline, 15 May 2025 O’Hara does little more than graffiti a mustache on this inexhaustible theatrical canvas. Charles McNulty, Los Angeles Times, 6 June 2025 Of all the things that led Joe Biden to ruin, his son’s inexhaustible appetite for making money off of his family’s famous name has to rank high on the list. Chris Stirewalt, The Hill, 13 May 2025 See All Example Sentences for inexhaustible

Word History

First Known Use

1601, in the meaning defined above

Time Traveler
The first known use of inexhaustible was in 1601

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Cite this Entry

“Inexhaustible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inexhaustible. Accessed 27 Jun. 2025.

Kids Definition

inexhaustible

adjective
in·​ex·​haust·​ible ˌin-ig-ˈzȯ-stə-bəl How to pronounce inexhaustible (audio)
1
: impossible to use up
an inexhaustible supply
2
: impossible to tire out
an inexhaustible worker
inexhaustibility noun
inexhaustibly adverb

More from Merriam-Webster on inexhaustible

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