Informal:
* "Agüí" (pronounced ah-gwee) is a common way to say goodbye to friends and family. It's a quick and casual phrase.
Formal:
* "Ñandejára ha'e ñande rehe" (pronounced nahn-deh-hah-rah hah-eh nahn-deh reh) is a more formal way to say goodbye. It translates to "May God be with you."
Other options:
* "Ñande reho" (pronounced nahn-deh reh-oh) means "I'm leaving" and can be used in a more formal context.
* "Ñandeicha" (pronounced nahn-deh-ee-cha) is a more affectionate way to say goodbye, like "see you later."
Tips:
* In Guarani, it's customary to greet and farewell people with a handshake or a hug.
* Using the formal or informal greeting depends on your relationship with the person you are greeting.
Remember that the best way to say goodbye in Guarani is to use the phrase that is most appropriate for the situation and your relationship with the person.