Wiktionary
unreformable
a. That cannot be reformed.
WordNet
unreformable
adj. insusceptible of reform; "vicious irreclaimable boys"; "irredeemable sinners" [syn: irreclaimable, irredeemable, unredeemable]
hopelessly bad; "an unregenerate criminal" [syn: depraved, unregenerate]
Usage examples of "unreformable".
And, if Flimflam could finagle trouble on Padrugoi, was it safe to send such unreformable personalities to the Station to serve their sentences?