This is the 5488th most frequent Spanish word.
pantalones
Pants or trousers.
Here, "pantalones" is used as the subject of the sentence, referring to the item of clothing.
Los pantalones están colgados en el armario.
The pants are hanging in the closet.
In this sentence, "pantalones" is the object being sought by María.
María busca sus pantalones favoritos para la fiesta.
Maria is looking for her favorite pants for the party.
The usage of "pantalones" here refers to its role as an item in a quantifiable list.