This is the 1299th most frequent Portuguese word.
americana
"Americana" in Portuguese means "American" (female) or can refer to a style or object related to the United States.
Here, 'americana' is used as a noun to describe a female individual from America.
Ela é uma americana que conhece bastante sobre o Brasil.
She is an American who knows a lot about Brazil.
In this case, 'americana' functions as an adjective describing a curtain in American style.
Poderíamos decorar a festa com uma cortina americana para dar um toque diferente.
We could decorate the party with an American-style curtain to give a different touch.
Here, 'americana' is used as an adjective to describe the eagle as being related to America.