The Collaborative International Dictionary of English v.0.48:
irreclaimable \ir`re*claim"a*ble\, a. Incapable of being reclaimed. --Addison. -- ir`re*claim"a*bly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
irreclaimable adj 1: insusceptible of reform; "vicious irreclaimable boys"; "irredeemable sinners" [syn: irreclaimable, irredeemable, unredeemable, unreformable]