grammar.pronouns.reciprocal
Reciprocal nos, os, se: each other
Plural reflexive pronouns can mean 'each other': se conocen, nos escribimos. Context (or mutuamente / el uno al otro) disambiguates.
grammarB1v0.1.0
Explicación
Nos, os, se with plural subjects often express mutual action: se abrazaron ('they hugged each other'), nos ayudamos ('we help each other').
When the sentence could also read as reflexive ('they hugged themselves'), Spanish adds el uno al otro or mutuamente: se miraron el uno al otro.
Ejemplos
Nos conocimos en Tarija.
We met (each other) in Tarija.
We met (each other) in Tarija.
Región: global
Se escriben todos los días.
They write to each other every day.
They write to each other every day.
Región: global