abrogate

This term carries a heavy weight of formality and legalism, typically appearing in diplomatic, judicial, or governmental contexts. It describes a deliberate, official action to render a law or treaty void, rather than a gradual fading of a rule or an accidental oversight. When applied to duties or responsibilities, the word suggests a conscious avoidance or a failure to uphold an obligation. It implies a breach of trust or a dereliction of duty that is often viewed as a serious ethical or legal failure.