Incorrigible
Incorrigible , adjective
[Latin incorrigibilis: compare French incorrigible. See In- not, and Corrigible.]
Not corrigible; incapable of being corrected or amended; bad beyond correction; irreclaimable; as, incorrigible error.
Incorrigible fools.
Incorrigible , noun
One who is incorrigible; a person whose persistent bad behavior cannot be changed; especially, a hardened criminal; as, the perpetual imprisonment of incorrigibles; incorrigible and disruptive children need to be placed in a separate classroom.