adjective
Synonyms: unutterable , incommunicable, indefinable, indescribable, inenarrable, inexpressible, undescribable, unexpressible, unspeakable, untellable
Related Word: celestial, empyreal, empyrean, heavenly; ethereal; divine, holy, sacred, spiritual; abstract, ideal, transcendent, transcendental
Contrasted words: expressible; utterable