pure vs unutterable

pure

adj
  • Of a single, simple sound or tone; said of some vowels and the unaspirated consonants. 

  • Free of foreign material or pollutants. 

  • Free of flaws or imperfections; unsullied. 

  • Done for its own sake instead of serving another branch of science. 

  • Mere; that and that only. 

  • Without harmonics or overtones; not harsh or discordant. 

  • A lot of. 

  • Free of immoral behavior or qualities; clean. 

verb
  • to hit (the ball) completely cleanly and accurately 

noun
  • One who, or that which, is pure. 

adv
  • to a great extent or degree; extremely; exceedingly. 

unutterable

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

  • Not allowed to be spoken; taboo, unspeakable. 

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

  • 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 pure and unutterable occurred in a corpus of books? (source: Google Ngram Viewer )