unlivable vs unutterable

unlivable

adj
  • Unfit to be lived in; uninhabitable. 

  • That cannot be lived. 

unutterable

adj
  • Incapable of being articulated or expressed; indescribable, inexpressible. 

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

  • Not allowed to be spoken; taboo, unspeakable. 

  • Extremely bad or objectionable; unspeakable. 

noun
  • Something which is unutterable (incapable of being physically spoken, incapable of being articulated or expressed, etc.). 

How often have the words unlivable and unutterable occurred in a corpus of books? (source: Google Ngram Viewer )