Im·pose, v. i. To practice tricks or deception.
 To impose on or To impose upon, (a)  to pass or put a trick on; to delude; to cheat; to defraud. “He imposes on himself, and mistakes words for things.”    (b) to place an unwelcome burden or obligation on (another person); as, she imposed on her friend to drive her daughter to school.   (c) to take unfair advantage of (a person, a friendship); as, he imposed on his friendship with The Mayor to gain business.