This is the 8683rd most frequent Portuguese word.
agravar
To worsen or aggravate.
Here, 'agravar' describes the action of making an existing issue more serious or problematic.
Seu comportamento só serve para agravar o problema existente.
Your behavior only serves to exacerbate the existing problem.
In this case, 'agravar' is applied to denote the worsening of medical symptoms or conditions.
Certas atitudes podem agravar os sintomas da doença.
Certain attitudes may aggravate the symptoms of the illness.
The verb 'agravar' is used to signify making a situation more severe or intense.