The correct term is unscrupulous (with tilde always). It means distrust, disgust, punches, repairs, apprehensions, gingerbreads, fears, squeamishness, disgust.
The word scruples in with accent or scruples, plural and singular is the reaction of morality, of a person before a given fact that prevents do, or lets you do, let make or prevent certain conduct; for example: use or not or prevent being used a dirty toilet; Rob, do not prevent it or denounce it; smoke, do it or avoid it.