improper

/ɪmˈprɑpər/
adjective
  1. Not correct or suitable for the situation; not following accepted rules or standards.
    • It would be improper to accept a gift from a client.
    • Wearing jeans to a formal wedding is considered improper.
    • The teacher said it was improper to talk during the exam.
  2. Not honest or morally wrong.
    • There were rumors of improper relationships between officials and contractors.
    • The politician was accused of improper use of campaign funds.
    • The company fired him for improper behavior toward coworkers.