How would one say goodbye in Spanish?

The story behind the answer

Adiós is correct because it’s the standard Spanish word for “goodbye.” It comes from the phrase “a Dios,” meaning “to God,” much like French “adieu.” The other options aren’t farewells in Spanish: salir means “to leave” (a verb), Hola means “hello,” and Au revoir is French for “goodbye.”

Remember it by linking adiós to adieu—they look and sound alike and share the same origin. You’ll also hear casual alternatives like hasta luego (“see you later”) or nos vemos (“see you”). In many Spanish-speaking countries, chau is common too. But when in doubt, adiós is a safe, clear way to say goodbye.