unforgivably

/ˌʌnfərˈɡɪvəbli/
adverb
  1. In a way that is so bad or wrong that it cannot be forgiven or excused.
    • He behaved unforgivably by lying to his best friend.
    • She spoke unforgivably rudely to her grandmother.
    • The company acted unforgivably when it ignored safety warnings.
Synonyms
What does "unforgivably" mean? | whatsthatwordmean | whatsthatwordmean