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.
그는 모든 상황에서 최선을 보는 불가救藥한 낙관주의자였다.