adjective 1.not exhaustible; incapable of being depleted: an inexhaustible supply.
2.untiring; tireless: an inexhaustible runner.
Origin: 1595–1605; <
Latin inexhaust(
us) not exhausted (see
in-3,
exhaust) +
-ible Related forms in·ex·haust·i·bil·i·ty, in·ex·haust·i·ble·ness, noun
in·ex·haust·i·bly, adverb