This is the 11335th most frequent Spanish word.
espaldas
"Espaldas" means "backs" in English.
Here, 'espaldas' is used to refer to the shoulders or back of a person, specifically where objects like backpacks can be carried.
Él llevaba una pesada mochila en sus espaldas.
He carried a heavy backpack on his shoulders.
In this context, 'espaldas' is used metaphorically to describe the area behind a person.
Una persona misteriosa apareció a mis espaldas.
A mysterious person appeared behind me.
The term 'espaldas' is utilized figuratively here, connoting secrecy or doing something without someone's awareness.