This is the 1037th most frequent Spanish word.
cuyo
"Whose" or "of which," used to indicate possession or relationship.
In this sentence, 'cuyo' refers to the talent belonging to the painter. It is used to express possession in a relative clause.
El pintor cuyo talento admiramos está exponiendo su obra.
The painter whose talent we admire is exhibiting his work.
Here, 'cuya' indicates the window belonging to the house. It agrees in gender and number with 'ventana,' which is feminine singular.
La casa cuya ventana está rota pertenece a mi abuela.
The house whose window is broken belongs to my grandmother.
In this context, 'cuyos' relates to the chapters belonging to the book, matching in gender and number with 'capítulos,' which is masculine plural.