This is the 8463rd most frequent Portuguese word.
waikás
"Waikás" refers to small, remote indigenous communities or villages, particularly of the Macuxi people in Brazil.
Here, 'waikás' again functions as a noun, specifying a group whose customs were discussed or studied.
Eu li sobre os costumes dos waikás em um livro.
I read about the customs of the waikás in a book.
In this sentence, 'waikás' is used as a noun to refer to a specific group of people, presumably indigenous or culturally distinct.
Os waikás vivem em harmonia com a natureza.
The waikás live in harmony with nature.
Again used as a noun, 'waikás' is denoting a cultural or ethnic group with specific linguistic and traditional characteristics.