This is the 12170th most frequent French word.
vibrent
"Vibrent" means "vibrate" (they vibrate).
In this sentence, 'vibrent' describes the physical vibration of the guitar strings as they are played.
Les cordes de la guitare vibrent sous mes doigts.
The guitar strings vibrate under my fingers.
Here, 'vibrent' is used metaphorically to express the intense emotional experience of the spectators.
Les spectateurs vibrent d'émotion pendant le spectacle.
The audience vibrates with emotion during the performance.
In this case, 'vibrent' depicts the action caused by sound waves impacting the walls.