Synonyms of unspeakable

1. indefinable, indescribable, ineffable, unspeakable, untellable, unutterable, inexpressible (vs. expressible), unexpressible: usage: defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor"
2. atrocious, abominable, awful, dreadful, painful, terrible, unspeakable, bad (vs. good): usage: exceptionally bad or displeasing; "atrocious taste"; "abominable workmanship"; "an awful voice"; "dreadful manners"; "a painful performance"; "terrible handwriting"; "an unspeakable odor came sweeping into the room"
3. ineffable, unnameable, unspeakable, unutterable, sacred (vs. profane): usage: too sacred to be uttered; "the ineffable name of the Deity"