incorrigible

US /ɪnˈkɔːr.ə.dʒə.bəl/
UK /ɪnˈkɔːr.ə.dʒə.bəl/
1.

tidak boleh diperbaiki

An incorrigible person or incorrigible behavior is bad and impossible to change or improve:

:
an incorrigible liar/rogue