Which term indicates a need to reverse or negate a previous directive?

The term that signifies a need to reverse or negate a previous directive is "Cancel." When a directive is canceled, it means that the actions or orders specified in that directive are no longer in effect, and any intended actions must cease. This term is often used in official communications to clearly indicate that the previous guidance is no longer valid, preventing any ambiguity about the status of the directive.

For example, in a military context, if a commanding officer issues an order that is later deemed unnecessary or incorrect, the appropriate term to use would be "Cancel," indicating that the previous order should not be followed. This helps maintain clarity and order within the chain of command, ensuring that everyone understands which directives are currently active and which have been rendered void.