This is the 2515th most frequent Catalan word.
vosaltres
"You" (plural, informal).
The word 'vosaltres' is used here as the subject pronoun for the second-person plural, indicating the group being addressed.
Vosaltres aneu a la festa?
Are you all going to the party?
In this sentence, 'vosaltres' is used as the object pronoun for the second-person plural, meaning the recipients of the action.
He portat això per vosaltres.
I brought this for you all.
Here, 'vosaltres' acts as the prepositional object referring to the group of people the speaker is spending time with.