This is the 8337th most frequent Portuguese word.
uefa
"UEFA" is not a Portuguese word; it stands for the Union of European Football Associations, the governing body of European soccer.
In this case, 'UEFA' is part of a proper noun, referring to a specific sports competition.
Vi uma partida emocionante da UEFA Champions League ontem.
I watched an exciting UEFA Champions League match yesterday.
Here, 'UEFA' is in the possessive form, attributing the regulations to the organization.
Ele estudou os regulamentos da UEFA para árbitros.
He studied UEFA's regulations for referees.
Here, 'UEFA' acts as the subject, representing the European football governing body.