This is the 10655th most frequent Spanish word.
dañando
"Damaging" or "hurting."
The sentence uses 'dañando' to indicate an ongoing action causing harm or damage to the book.
Estás dañando el libro al doblar las páginas.
You are damaging the book by folding its pages.
Here, 'dañando' denotes a continuous action negatively affecting the relationship.
Ella está dañando la relación con sus constantes críticas.
She is damaging the relationship with her constant criticisms.
In this case, 'dañando' conveys an ongoing activity where rain results in deterioration of the paintings.