We say that someone is unscrupulous when they deliberately commit immoral actions, without a guilty conscience. Not only do they not feel remorse, but they also have an attitude of indifference toward the resulting negative consequences. We can even say that they generate a certain evil, perverse pleasure, like an arsonist who enjoys seeing entire forests ablaze, scorched, and devastated. Therefore, a person who is unscrupulous has no regard for anything other than the self, nor does the discomfort of others cause them any anguish. But where does this expression come from? What are scruples? According to the first meaning of the term, Dictionary of the Catalan language from the Institute of Catalan Studies (DIEC), ''scruple' is a "very small part of a thing" and, according to the second, a "doubt, a concern of conscience, about something of little weight." Although the meaning of the expression is currently linked to the second meaning, its origin is closer to the first or, rather, draws on both.