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

Whitfield has just come up with a new and inexhaustible way to rape this land. —Amanda Whiting, Vulture, 2 Mar. 2025

The list of jaw-dropping names in attendance every year is virtually inexhaustible. —Jem Aswad, Variety, 31 Jan. 2025

In my work with Fortune 500 companies and FTSE 100 organizations, the capacity for human innovation and ideation remains a renewable (and inexhaustible) resource. —Chris Westfall, Forbes, 15 Jan. 2025

The truth about cruise ships turns out to be what their inexhaustible supply of indulgences reveal about the passenger. —John Roy, Vulture, 14 Jan. 2025

Word History

First Known Use

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