malfeasance
Concise Oxford English Dictionary © 2008 Oxford University Press:
malfeasance /malˈfiːz(ə)ns/
▶noun Law wrongdoing, especially (US) by a public official.
– derivatives
malfeasant noun & adjective.
malfeasant noun & adjective.
– origin C17: from Anglo-Norman Fr. malfaisance, from mal- ‘evil’ + OFr. faisance ‘activity’.
'malfeasance' also found in these Oxford entries:

