inexpiable

/ɪnˈɛkspiəbəl/
adjective
  1. (of a wrong or offense) impossible to make amends for or atone for; unforgivable.
    • He felt his mistake was inexpiable, though others were willing to forgive.
    • The betrayal was considered an inexpiable crime by the community.
    • Some believe that certain historical atrocities are inexpiable.
What does "inexpiable" mean? | whatsthatwordmean | whatsthatwordmean