Added 8 October 2026 inexhaustible /ɪnɪɡˈzɔːstɪbl̩/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about inexhaustible at Wordnik → Where our words come from → That cannot be entirely consumed or used up. an inexhaustible supply of coal Incapable of being entirely consumed or used up. an inexhaustible supply of coal Related Words: unfailinginfiniteunlimitedrenewablelimitlessboundlesstirelessendlessunflaggingunendinginsatiableinterminable Back to today's word