inexhaustible

1 of 2

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

inexhaustibility

2 of 2

noun

in·​exhaustibility "+ 

: the quality or state of being inexhaustible : unfailingness

Synonyms of inexhaustible

Adjective

• meticulous
• indefatigable
• unflagging
• relentless
• untiring
• tireless
• active
• vigorous
• energetic
• conscientious
• intense
• diligent

Examples of inexhaustible in a Sentence

Adjective

The world's supply of oil is not inexhaustible.

He seems to have inexhaustible energy.

Recent Examples on the Web

Adjective

Materials, like symbols, are recycled across sculptures and tableaux in an inexhaustible loop. — Tara Anne Dalbow, Los Angeles Times, 15 July 2026

The animal, fizzing with the inexhaustible energy of a creature bred for hauling chockablock toboggans, was confined to a tiny pen, a mere twenty feet square, behind the neighbor’s trailer. — Literary Hub, 10 July 2026

Denmark has a seemingly inexhaustible supply of acting talent, and The Guest is proof of that. — Damon Wise, Deadline, 6 July 2026

But the collapse of North Atlantic cod remains a stark reminder that nothing is inexhaustible. — Encyclopedia Britannica, 30 June 2026

Word History

First Known Use

Adjective

1601, in the meaning defined above

Rhymes for inexhaustible

• exhaustible

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