What are 3 unusual words that also mean goodbye?

Here are 3 unusual words that also mean goodbye:

- Adieu (French): This is a formal way of saying goodbye, often used in written correspondence or in a more formal setting.

- Ta-ta (British): This is a more informal way of saying goodbye, often used among friends and family.

- Ciao (Italian): This is a casual way of saying goodbye, often used when parting with friends or acquaintances.