This is the 8971st most frequent Spanish word.
us
In Spanish, "us" is not a word. If you meant "nos," it means "us" in English, referring to the first-person plural pronoun.
The word 'us' is translated to 'nos,' which works as the direct object pronoun in this sentence, receiving the action of the verb 'invitar'.
Ellos nos invitaron a la fiesta.
They invited us to the party.
The word 'us' is also translated to 'nos,' functioning as a direct object pronoun showing the entity that is affected by the verb 'escuchar' in the subjunctive mood.
Nosotros queremos que nos escuchen.
We want them to listen to us.
Here, 'us' correlates to 'nos,' working as an indirect object pronoun that expresses the entity experiencing the judgment or the subject of concern described by the verb 'preocupar'.