inexhaustible

in·ex·haust·ible

adjective \ˌi-nig-ˈzȯ-stə-bəl\

Definition of INEXHAUSTIBLE

: not exhaustible: as

a : incapable of being used up <inexhaustible riches>

b : incapable of being wearied or worn out <an inexhaustible hiker>

— in·ex·haust·ibil·i·ty \-ˌzȯ-stə-ˈbi-lə-tē\ noun

— in·ex·haust·ible·ness \-ˈzȯ-stə-bəl-nəs\ noun

— in·ex·haust·ibly \-blē\ adverb

Examples of INEXHAUSTIBLE

1. The world's supply of oil is not inexhaustible.
2. He seems to have inexhaustible energy.

First Known Use of INEXHAUSTIBLE

1601

Related to INEXHAUSTIBLE

Synonyms

indefatigable, tireless, unflagging, untiring, weariless

Related Words

assiduous, conscientious, diligent, meticulous, painstaking, sedulous; determined, dogged, patient, persevering, persistent, pertinacious, plodding, relentless, steadfast, steady, stubborn, tenacious, unabating, unfailing, unfaltering, unflinching, unrelenting, unremitting, unwavering; active, busy, dynamic, energetic, feverish, spirited, vigorous; hard, industrious, intense, laborious, slavish, strenuous

Near Antonyms

indolent, lackadaisical, laggard, lazy, listless, shiftless, slothful, sluggish; apathetic, casual, desultory, languid, spiritless; beat, broken, burned-out (or burnt-out), done in, drained, enervated, jaded, overtaxed, overworked, played out, sapped, spent, tuckered (out), wearied, worn-out