/ Dictionary / Index I inexhaustible: Meaning and Definition of Find definitions for: in•ex•haust•i•ble Pronunciation: (in"ig-zôs'tu-bul), [key] — adj. not exhaustible; incapable of being depleted: an inexhaustible supply. untiring; tireless: an inexhaustible runner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: inexhaustible (Thesaurus) inexertion inexistent Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language