This is the 4488th most frequent Spanish word.
aguda
A Spanish word stressed on the last syllable and typically requiring a written accent if it ends in a vowel, "n," or "s."
Here, 'agudo' is used to describe the intensity or sharpness of the pain.
Tengo un dolor agudo en el pecho.
I have a sharp pain in my chest.
In this case, 'aguda' is a linguistic term referring to words where the stress is on the last syllable.
La palabra 'acción' es una palabra aguda.
The word 'acción' is an acute word.
Here, 'aguda' is used metaphorically to describe someone's mental sharpness or acuity.