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inexhaustible

American  
[in-ig-zaws-tuh-buhl] / ˌɪn ɪgˈzɔs tə bəl /

adjective

  1. not exhaustible; incapable of being depleted.

    an inexhaustible supply.

  2. untiring; tireless.

    an inexhaustible runner.


inexhaustible British  
/ ˌɪnɪɡˈzɔːstəbəl /

adjective

  1. incapable of being used up; endless

    inexhaustible patience

  2. incapable or apparently incapable of becoming tired; tireless

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • inexhaustibility noun
  • inexhaustibleness noun
  • inexhaustibly adverb

Etymology

Origin of inexhaustible

1595–1605; < Latin inexhaust ( us ) not exhausted ( in- 3, exhaust ) + -ible

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.

She, however, accrued an inexhaustible supply of IOUs.

From Barron's • Dec. 31, 2025

But again, these are not inexhaustible pots of money.

From The Wall Street Journal • Oct. 24, 2025

It will find new cures for deadly diseases, solve climate change and invent an inexhaustible supply of clean energy, they argue.

From BBC • Oct. 9, 2025

The Ogallala Aquifer, which rests beneath the Great Plains and was once thought inexhaustible, now drops several feet per year in some areas, turning what was once America’s breadbasket into tomorrow’s dust bowl.

From Salon • Jul. 12, 2025

Bronwyn, seemingly inexhaustible, rowed one of the boats all by herself.

From "Hollow City" by Ransom Riggs