The term 'BEHAVE IMPROPERLY' can be summarized by the word 'MISBEHAVE', which is a nine-letter word. Misbehaving is an act of not following the rules or behaving in a socially unacceptable manner. It can range from minor infractions such as talking back to authority figures, to more serious offenses such as vandalism or theft. Misbehaving can have serious consequences, including disciplinary action or even criminal charges.