What is the Greek translation bye?

There isn't a single perfect Greek translation for "bye," as the best choice depends on the context and level of formality. Here are a few options:

* Γεια (Gia): This is a common and informal way to say goodbye, similar to "hi" or "hey" in its versatility. It's a good general choice for casual situations.

* Χαίρε (Chaire): This is a more formal and classical way to say goodbye, roughly equivalent to "farewell." It's less common in everyday speech.

* Αντίο (Adio): This is a loanword from Italian ("addio"), and it's a perfectly acceptable and widely understood way to say goodbye in modern Greek. It's fairly neutral in formality.

* γεια σου (ya sou): This is a slightly more informal variation of "Γεια," adding a polite form of "you."

The best choice depends on who you're talking to and the setting. For most everyday situations, Γεια (Gia) or Αντίο (Adio) would be perfectly suitable.