unsayables

/ʌnˈseɪəbəlz/
noun
  1. Things that cannot be said or expressed in words, often because they are too painful, taboo, or profound.
    • The poem tried to capture the unsayables of love and loss.
    • In therapy, she finally spoke about the unsayables she had kept hidden for years.
    • Some cultures have strict rules about unsayables in public conversation.