overturn

This term conveys a sense of total reversal, whether physical or systemic. When used physically, it suggests a violent or sudden loss of balance that results in an upside-down position, often implying a crash or a capsize. In legal or political contexts, it describes the complete nullification of a previous authority. It is more definitive than "modify" or "challenge," as it implies the original decision is rendered entirely void and replaced by a new state of affairs.