adj .
incapable of being reformed 교정시킬 수 없는, 제멋대로 구는

• The convict was an incorrigible criminal ; as soon as he got out of prison, he said he was going to rob another doughnut store.
• Bill is incorrigible -- he eats three bags of potato chips every day even though he knows that eating two would be better for him.
• Ever-cheerful Annie is an incorrigible optimist.
  
• Think of incorrigible as incorrectable. The word corrigible is rarely seen or used these days.