What is the Italian word for goodbye?

Addio, Arrivederci and Ciao are Italian equivalents of the English Word "Goodbye!" Context makes clear whether "Goodbye" implies possibly not seeing one another again since it is up "to God" (case 1), means "Until we see each other again!" (example 2) or "Bye!" (instance 3). The respective pronunciations will be "ad-DEE-o," ""ar-REE-vey-DER-tchee" and "tchow" in Italian.