unforgivably
1. [ adverb ] in an unpardonable manner or to an unpardonable degree
Synonyms: unpardonably inexcusably
Examples:

"he was inexcusably cruel to his wife"

Related terms: excusably excusably excusably inexcusable unpardonable inexcusable inexcusable inexcusable
Similar spelling:   unforgivable
  unforgivingly
  unforgettably
  unforgiving
  unforgettable
  unforfeitable
  unforeseeable
  uniformity