[adj] defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor"
[adj] 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"
[adj] too sacred to be uttered; "the ineffable name of the Deity"
Synonyms
abominable, atrocious, awful, bad, dreadful, indefinable, indescribable, ineffable, inexpressible, painful, sacred, terrible, unexpressible, unnameable, untellable, unutterable