This is the 11509th most frequent Portuguese word.
organizadas
"Organizadas" means "organized" in English.
Here, 'organizadas' is used as a past participle and adjective to describe parties that were planned or managed by someone.
As festas organizadas por eles sempre têm bastante variedade.
The parties organized by them always have a lot of variety.
In this case, 'organizadas' functions as an adjective describing students who are disciplined or have good planning abilities.
As estudantes organizadas ganharam um mapa detalhado do campus.
The organized students received a detailed map of the campus.
Here, 'organizadas' is used as a verb form (past participle) in a passive voice construction, implying the action of organizing.