impious impious /ˌɪmˈpaɪəs/

adjective

1. () Lacking piety or reverence for a god  ( impious )
   lacking piety or reverence for a god
   
2. Lacking due respect or dutifulness  ( impious , undutiful )
   lacking due respect or dutifulness
    Impious toward one's parents
   impious toward one's parents
    An undutiful son
   an undutiful son