Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adverb: unpardonably  ,ún'paa(r)-du-nu-blee
  1. In an unpardonable manner or to an unpardonable degree
    "He behaved unpardonably rudely to his hosts";
    - inexcusably, unforgivably

Antonym: forgivably