amplifier

This term carries a strong association with electricity and sound engineering. It evokes the image of taking a weak, quiet input and boosting it into something loud and commanding. In a technical sense, it is about gain and voltage, but in a cultural sense, it is the heartbeat of rock and roll music.

Beyond electronics, the word is used to describe anything that makes a feeling or a situation more intense. When a political event acts as an amplifier for social unrest, it is not creating the anger, but rather magnifying a pre-existing tension to a level where it becomes impossible to ignore.