disapproval If you describe a person as unscrupulous, you are critical of the fact that they are prepared to act in a dishonest or immoral way in order to get what they want. These kids are being exploited by very unscrupulous people. the unscrupulous use of hostages. behaving in an unfair or dishonest way
without scruples or principles; "unscrupulous politicos who would be happy to sell their country in order to gain power"