This is the 12715th most frequent Spanish word.
nutren
"They nourish" or "they feed."
In this sentence, 'nutren' is used as a reflexive verb referring to the self-nourishment process of plants.
Las plantas se nutren de los minerales del suelo.
Plants nourish themselves from the minerals in the soil.
Here, 'nutren' expresses the action of nurturing or enriching one's mental state through books, applied to an abstract concept.
Los buenos libros nutren la mente de las personas.
Good books nurture people's minds.
'Nutren' in this context indicates the act of providing care and emotional growth to others.