Also means
to intensify
Usage Note
Amplifier is used for both physical amplification (sound, signal) and figurative intensification (a crisis, a rumour). The noun is amplificateur (m) for a device, or amplification (f) for the process. In media contexts, amplifier un message means 'to amplify a message' — spreading or magnifying it, not just making it louder.
Examples
"Le micro amplifie la voix du chanteur."
Natural Translation
The microphone amplifies the singer's voice.

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