UNUTTERABLE
unpronounceable, unutterable
(adjective) very difficult to pronounce correctly; “an unpronounceable foreign word”; “unutterable consonant clusters”
indefinable, indescribable, ineffable, unspeakable, untellable, unutterable
(adjective) defying expression or description; “indefinable yearnings”; “indescribable beauty”; “ineffable ecstasy”; “inexpressible anguish”; “unspeakable happiness”; “unutterable contempt”; “a thing of untellable splendor”
ineffable, unnameable, unspeakable, unutterable
(adjective) too sacred to be uttered; “the ineffable name of the Deity”
Source: WordNet® 3.1
Etymology
Adjective
unutterable (comparative more unutterable, superlative most unutterable)
Not utterable; incapable of being spoken or voiced
Synonyms: inexpressible, ineffable, unspeakable, Thesaurus:indescribable
Anagrams
• enturbulate
Source: Wiktionary
Un*ut"ter*a*ble, a.
Definition: Not utterable; incapable of being spoken or voiced;
inexpressible; ineffable; unspeakable; as, unutterable anguish.
Sighed and looked unutterable things. Thomson.
– Un*ut"ter*a*ble*ness, n.
– Un*ut"ter*a*bly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition