Smart Definition
Etymology
Pronunciation
grueso
thick
Grueso means thick. It's used to describe objects that have considerable depth or width, like a grueso libro (thick book) or una pared gruesa (a thick wall).
adjective
  1. thick
    Thick or fat
    El libro tiene una cubierta gruesa. // The book has a thick cover.
noun
  1. bulk
    The main part or bulk of something
    El grueso de la población vive en la ciudad. // The bulk of the population lives in the city.