This is the 8683rd most frequent French word.
atténuer
To lessen, reduce, or diminish.
Here, 'atténuer' means to reduce or lessen something, in this case, stress.
La musique apaisante peut atténuer le stress après une longue journée.
Soothing music can alleviate stress after a long day.
In this example, 'atténuer' is used to describe lessening the intensity of light.
Les rideaux épais atténuent la lumière qui entre dans la pièce.
Thick curtains diminish the light entering the room.
Here, 'atténuer' is utilized to signify reducing the adverse effects of an illness.