INEXHAUSTIBLE

[in.ex.haust.ible] adj (1601): not exhaustible: as a: incapable of being used up "~ riches" b: incapable of being wearied or worn out "an ~ hiker" -- in.ex.haust.ibil.i.ty n -- in.ex.haust.ible.ness n -- in.ex.haust.ibly adv