What is the meaning of unspeakable?

adjective

• Defying expression or description.
  • usage: "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor"
  • synonyms: indefinable, indescribable, ineffable, untellable, unutterable
• Exceptionally bad or displeasing.
  • usage: "atrocious taste"; "abominable workmanship"; "an awful voice"; "dreadful manners"; "a painful performance"; "terrible handwriting"; "an unspeakable odor came sweeping into the room"
  • synonyms: atrocious, abominable, awful, dreadful, painful, terrible
• Too sacred to be uttered.
  • usage: "the ineffable name of the Deity"
  • synonyms: ineffable, unnameable, unutterable