Source : Webster's Revised Unabridged Dictionary (1913)

Irreclaimable \Ir`re*claim"a*ble\, a.
   Incapable of being reclaimed. --Addison. --
   {Ir`re*claim"a*bly}, ad?.

Source : WordNet®

irreclaimable
     adj : insusceptible of reform; "vicious irreclaimable boys";
           "irredeemable sinners" [syn: {irredeemable}, {unredeemable},
            {unreformable}]