Malfunctional is a term used to describe something that is not functioning correctly or in the way it is supposed to. There are several synonyms for the term, including malfunctioning, broken, defective, flawed, damaged, faulty, not working, out of order, and inoperative. These terms all refer to a malfunctioning item such as a machine, system, or device that is not performing properly or as expected. It can also be used to describe a person who is not functioning as they should. The term maladaptive can also be used to describe something that is not functioning in a way that is adaptive or helpful for its intended purpose.