incorrigible Today's word and lesson for my grandson and me

 in·cor·ri·gi·ble  (ĭn-kôr′ĭ-jə-bəl, -kŏr′-)

adj.

1. Incapable of being corrected or reformed: an incorrigible criminal.

2. Firmly rooted; ineradicable: incorrigible faults.

3. Difficult or impossible to control or manage: an incorrigible, spoiled child.

n.

One that cannot be corrected or reformed.

https://www.thefreedictionary.com/incorrigible