inexhaustibility (ˌinexˌhaustiˈbility) or inexhaustibleness (ˌinexˈhaustibleness)
inexhaustible for learners of EnglishPowered by COBUILD (ɪnɪgzɔːstəbəl)
If there is an inexhaustible supply of something, there is so much of it that it cannot all be used up. ⇒ She has an inexhaustible supply of enthusiasm. ⇒ His energy was unbounded and his patience inexhaustible.
`You have a talent for picking on inexhaustible topics," he said with a laugh.Lyall, Francis A DEATH IN TIMEShe was enterprising and inexhaustible , she got them to films and to marches they'd only talked of going to.Harvey, John COUP D'ETATSorrow - well, that's inexhaustible... Of course we had our excitements.Aldiss, Brian SOMEWHERE EAST OF LIFEThe larva had fared well in its brief time in the forest, surrounded by an inexhaustible supply of vegetation.Gregg Andrew Hurwitz MINUTES TO BURN