unjust

This term carries a heavy moral weight, suggesting a violation of a fundamental right or a failure of a system intended to provide fairness. It is often used in legal, political, or ethical debates where the focus is on a systemic or structural failure rather than a simple mistake. While "unfair" is a common word used for small daily grievances, such as a sibling getting a larger piece of cake, "unjust" is reserved for grave inequities, like an innocent person being imprisoned or a law that discriminates against a specific group.