in·cor·ri·gi·ble
adjective/ɪnˈkɒrɪdʒəbl/
/ɪnˈkɔːrɪdʒəbl/
(disapproving or humorous)- having bad habits that cannot be changed or improved
无法改正的；屡教不改的 - I'm an incorrigible optimist.
我是一个无可救药的乐观主义者。 - You're incorrigible!
你简直不可救药！ - She thought the children were incorrigible brats.
她认为孩子们都是不可救药的顽童。
Word OriginMiddle English: from Old French, or from Latin incorrigibilis, from in- ‘not’ + corrigibilis (from Latin corrigere ‘to correct’). - I'm an incorrigible optimist.