incorrigible
🇺🇸
/ɪnˈkɔːrɪdʒəbl/
🇬🇧
/ɪnˈkɒrɪdʒəbl/
Someone who cannot be improved or taught to behave better.
He was an incorrigible optimist, always seeing the best in every situation.
彼は望み行事の最高潮で、常にすべての状況で最高のものを見ている。