incorrigible
‘incapable of being corrected’
Lexical development traced from the Tamil root:
E. incorygibile, incorigibyll, incorrygyble < O.F. incorrigible ‘perfect, beyond rebuke or discipline’ < Lat. incorrigibilis ‘not to be corrected’ < in- ‘not’ + corrigibilis < corrigere ‘to correct’ < com- + regere ‘to lead straight, rule’ < ruhj < reg- < Tamil aracaṉ