malfeasance
noun [ U ] law specialized uk/mælˈfiː.zəns/ us/mælˈfiː.zəns/
（尤指掌权者的）违法乱纪行为，渎职
an example of dishonest and illegal behaviour, especially by a person in authority
Several cases of malpractice and malfeasance in the financial world are currently being investigated. 金融界的几起渎职违规案件目前正在调查之中。