unforgivable
1. [ adjective ] not excusable
Synonyms: inexcusable
Related terms: unpardonable
Similar spelling:   unforgivably
  unforgettable
  unforfeitable
  unforeseeable
  unforgiving
  unportable
  unforgivingly
  unforgettably
  unperceivable
  unprovable
  uniformize
  uniformise