D defs.my
Entry 2 senses Webster, 1913

Unatonable

· Un·a·ton·a·ble · IPA /ʌnəˈtəʊnəbəl/
01 a. Not capable of being brought into harmony; irreconcilable.
  1. 1.
    Not capable of being brought into harmony; irreconcilable.[Obs.]
  2. 2.
    Incapable of being atoned for; inexpiable.