This is the 2903rd most frequent Portuguese word.
guiné
"Guiné" in Portuguese refers to "Guinea," a region in West Africa or the name of several countries, such as Guinea-Bissau or Guinea-Conakry.
The word 'guiné' is used as a proper noun referring to the country Guinea.
Eu visitei a Guiné no ano passado.
I visited Guinea last year.
Here, 'guiné' is part of the compound proper noun 'Guiné-Bissau', referring to the country Guinea-Bissau.
Minha amiga é de Guiné-Bissau.
My friend is from Guinea-Bissau.
In this sentence, 'guiné' is used adjectively to refer to the specie guinea fowl (galinha-guiné or helmeted guineafowl).