Incorrigible

прилагательное 1) неисправимый, безнадёжный; непоправимый Синоним(ы): irreparable, irremediable, irretrievable 2) закоренелый, непослушный Синоним(ы): unruly, inveterate

Большой англо-русский словарь

Incorrigible

adjective Etymology: Middle English, from Late Latin incorrigibilis, from Latin in- + corrigere to correct — more at correct incapable of being corrected or amended: as a. (1) not reformable; depraved (2) delinquent b. not manageable; unruly c. unalterable, inveterateincorrigibility nounincorrigible nounincorrigibleness nounincorrigibly adverb

Merriam-Webster's Collegiate Dictionary