unutterable

/(ˌ)ʌnˈʌt(ə)ɹəbl̩/adj

High School

Not utterable; incapable of being physically spoken or voiced; unpronounceable.

Incapable of being articulated or expressed; indescribable, inexpressible.

Not allowed to be spoken; taboo, unspeakable.

Extremely bad or objectionable; unspeakable.

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