1. (adj) indefinable, indescribable, ineffable, unspeakable, untellable, unutterable
defying expression or description
Synonyms: unnameable, atrocious, painful, indefinable, undefinable, awful, terrible, unpronounceable, unspeakable, indescribable, unutterable, untellable, abominable, dreadful, ineffable
Antonyms: good, expressible, profane, secular
2. (adj) atrocious, abominable, awful, dreadful, painful, terrible, unspeakable
exceptionally bad or displeasing
Synonyms: irritating, dreadful, indescribable, indefinable, awful, sore, odious, unnameable, execrable, horrifying, frightful, amazing, horrendous, severe, tremendous, dreaded, dire, afflictive, flagitious, grievous, monstrous, atrocious, ineffable, painful, detestable, awing, awed, wicked, dread(a), awe-inspiring, unspeakable, horrific, nasty, terrible, horrible, abominable, frightening, unutterable, awesome, fearsome, fearful, direful, untellable, ugly
Antonyms: secular, expressible, good, profane
3. (adj) ineffable, unnameable, unspeakable, unutterable
too sacred to be uttered
Synonyms: unnameable, atrocious, painful, indefinable, awful, terrible, unpronounceable, unspeakable, indescribable, unutterable, untellable, abominable, dreadful, ineffable
Antonyms: secular, good, profane, expressible
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Synonyms for unspeakable 
