unspeakably

/ʌnˈspikəbli/
adverb
  1. To a degree that cannot be expressed in words; extremely or indescribably (often used for negative or intense emotions).
    • The view from the mountain was unspeakably beautiful.
    • He felt unspeakably sad after hearing the news.
    • The conditions in the prison were unspeakably cruel.
What does "unspeakably" mean? | whatsthatwordmean | whatsthatwordmean