| a. | 1. | Not utterable; incapable of being spoken or voiced; inexpressible; ineffable; unspeakable; |
| Adj. | 1. | unutterable - too sacred to be uttered; "the ineffable name of the Deity" |
| 2. | unutterable - defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor" | |
| 3. | unutterable - very difficult to pronounce correctly; "an unpronounceable foreign word"; "unutterable consonant clusters" Synonyms: unpronounceable |