inexhaustible

adjective

in·​ex·​haust·​ible ˌi-nig-ˈzȯ-stə-bəl 

: not exhaustible: such as

a

: incapable of being used up

inexhaustible riches

b

: incapable of being wearied or worn out

an inexhaustible hiker

inexhaustibility

ˌi-nig-ˌzȯ-stə-ˈbi-lə-tē 

noun

inexhaustibleness

ˌi-nig-ˈzȯ-stə-bəl-nəs 

noun

inexhaustibly

ˌi-nig-ˈzȯ-stə-blē 

adverb

Synonyms

• indefatigable
• tireless
• unflagging
• untiring
• weariless

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

The show is his baby, gestated with the dramaturg Jacob Mallinson Bird and delivered with mad-scientist zeal by the inexhaustible director Dustin Wills. —Sara Holdren, Vulture, 5 Sep. 2024

Jung shows how the richness of our inner lives is inexhaustible. —The Week Us, theweek, 5 Nov. 2024

Awareness that natural resources are not inexhaustible. —David Malcolm, Forbes, 1 Nov. 2024

The pair weren’t meant to be an intentional double feature — Challengers was originally slated for a 2023 release until the strike pushed it back — but the two end up functioning as a survey of Guadagnino’s inexhaustible interest in the topic of desire. —Alison Willmore, Vulture, 3 Sep. 2024

Word History

First Known Use

1601, in the meaning defined above

Kids Definition

inexhaustible

adjective

in·​ex·​haust·​ible ˌin-ig-ˈzȯ-stə-bəl 

1

: impossible to use up

an inexhaustible supply

2

: impossible to tire out

an inexhaustible worker

inexhaustibility

-ˌzȯ-stə-ˈbil-ət-ē 

noun

inexhaustibly

-ˈzȯ-stə-blē 

adverb