Meaning - ineffable [inˈefəb(ə)l] ADJECTIVE too great or extreme to be expressed or described in words. "the ineffable natural beauty of the Everglades" synonyms: inexpressible · indescribable · beyond words · beyond description · beggaring description · undefinable · unutterable · untold · unheard of · unthought of · unimaginable · [more] not to be uttered. "the ineffable Hebrew name that gentiles write as Jehovah"