retrigger

To retrigger is to trigger again—to restart or reactivate something that had already been set in motion.

The term appears frequently in gaming, where abilities or effects can retrigger under certain conditions: If you land three scatters, the bonus round retriggers.

In audio production, retriggering restarts an envelope or sample from the beginning rather than letting it continue.

Technical contexts dominate: The alarm retriggered after the motion sensor detected movement.