misfeasance

Improper and unlawful execution of an act that in itself is lawful and proper.

In law: A trespass; a wrong done

In modern use, more specifically, the misuse of power; misbehavior in office; the wrongful and injurious exercise of lawful authority, as distinguished from malfeasance and nonfeasance. This word is often carelessly used in the sense of malfeasance.

A trespass; a wrong arising from an overt act; the improper doing of an act which a person might lawfully do.

A wrong that arises from an action. The wrong can be actual or alleged. This word is often used in law, relating to the wrongful use of legal authority.

doing a proper act in a wrongful or injurious manner