irredeemable
1. [ adjective ] insusceptible of reform
Synonyms: unredeemable unreformable irreclaimable
Examples:

"vicious irreclaimable boys" "irredeemable sinners"

Related terms: wicked
2. [ adjective ] (of paper money) not convertible into coin at the pleasure of the holder
Related terms: inconvertible
Similar spelling:   irredenta
  irredentism
  irredentist