- irreclaimable, irredeemable, unredeemable, unreformable - insusceptible of reform; "vicious irreclaimable boys"; "irredeemable sinners"
Antonym: virtuous (indirect, via wicked)
- depraved, unreformable, unregenerate - hopelessly bad; "an unregenerate criminal"
Antonym: corrigible (indirect, via incorrigible)