| Inexpressible (a.) Ineffable; unspeakable; indescribable; unutterable; as, inexpressible grief or pleasure. Thesaurus Entries awesome, awful, divine, heavenly, holy, incommunicable, indefinable, indescribable, ineffable, inenarrable, innominable, inviolable, inviolate, noncommunicable, numinous, religious, sacred, sacrosanct, spiritual, undefinable, unmentionable, unnameable, unspeakable, untellable, untouchable, unutterable, unwhisperable, venerable |