This is the 230th most frequent Catalan word.
portaveu
Spokesperson.
Here, 'portaveu' is used as a noun referring to a person who acts as a spokesperson, representing the group's opinions.
La portaveu del grup va explicar les mesures que es prendrien.
The spokesperson of the group explained the measures that would be taken.
In this sentence, 'portaveu' is used metaphorically to describe someone who represents or speaks on behalf of others in informal settings.
En Joan sempre fa de portaveu dels seus germans menors.
Joan always acts as a spokesperson for his younger siblings.
In this example, 'portaveu' is used abstractly to denote the function or position of a spokesperson in a general sense.