Final answer:
Moral outrage is the term used to describe a person's feelings of powerlessness to stop unethical behavior in another person or institution.
Step-by-step explanation:
The term used to identify a person's feelings of powerlessness to stop unethical behavior in another person or institution is moral outrage. Moral outrage is the emotional response to witnessing or experiencing immoral or unethical behavior. It is the feeling of anger, frustration, and helplessness when faced with actions that go against one's moral values.