Carioca ( or ) is a Brazilian noun or substantive used to refer anything related to the city of Rio de Janeiro—capital of the homonymous state (Rio de Janeiro)—in Brazil. The original word, "kara'i oka", comes from the indigenous Tupi language meaning "white man's house". It is said that the first Portuguese dwellings in Rio de Janeiro were placed along a limpid stream, which was soon adapted into Portuguese as Carioca.