(ˈ)im, əm+ noun
Etymology: Middle French impieté, from Latin impietat-, impietas, from impius impious + -tat-, -tas -ty — more at impious
1.
a. : the quality or state of being impious : lack of piety : irreverence , ungodliness
impiety , in denying the gods recognized by the state — J.S.Mill
b. : undutifulness
guilty of filial impiety in showing no respect for his father's advice
2. : an impious act
his sins turned into his impieties — William Empson