Which word describes something that is morally right or justifiable?

The term "righteous" specifically refers to actions or behaviors that are morally right or justifiable according to ethical principles. It encompasses the idea of being morally upright and is often used in a context where one’s decisions align with a sense of justice and fairness.

While "virtuous" also conveys a sense of moral goodness, it more commonly emphasizes personal character traits rather than justifiable actions. Similarly, "just" relates closely to fairness and legality but might not encompass the broader moral implications that "righteous" does. "Ethical," on the other hand, pertains to principles of right conduct and moral philosophy, but it might not evoke the same personal commitment to moral correctness as "righteous" does. Hence, "righteous" is the term that most directly aligns with the idea of being morally right or justifiable.