Noun
/ˈri.o de xaˈneɾo/
"Río de Janeiro" is a proper noun referring to a city in Brazil. The term is most commonly used in its written form in formal contexts. It is not a word used in everyday oral speech among Spanish speakers.
The Rio de Janeiro carnival is one of the most famous events in the world.
Visité el Cristo Redentor en Río de Janeiro durante mis vacaciones en Brasil.
Meaning: To be incredibly lost or confused.
"De Río de Janeiro a Mar del Plata"
Meaning: A long journey, indicating a significant distance between two places.
"Salir de Guatemala y meterse en Guatepeor"
The term "Río de Janeiro" translates to "River of January" in English. The city was named by the Portuguese explorers who first arrived in the bay in January 1502, mistaking the bay for the mouth of a river.