This is the 8485th most frequent Polish word.
portugalii
"Portugalii" means "of Portugal" or "Portugal" in the locative case in Polish.
The word 'Portugalii' here is the locative case form of 'Portugalia', used in contexts that require indicating location 'in Portugal'.
Byłem w Portugalii w zeszłym roku.
I was in Portugal last year.
The word 'Portugalii' functions in the genitive case of 'Portugalia', used here to show origin 'from Portugal'.
Chciałbym spróbować wina z Portugalii.
I would like to try wine from Portugal.
In this sentence, 'Portugalii' takes the dative case of 'Portugalia', used with the preposition 'do' to indicate direction 'to Portugal'.