Informal:
* "سلام" (salaam): This is the most common and versatile way to say goodbye. It's a general greeting that can be used in almost any situation.
* "مع السلامة" (ma'a al-salama): This is a more formal way to say goodbye, literally meaning "with peace."
* "واش" (waash): This is a very informal way to say goodbye, often used among friends and family.
Formal:
* "مع السلامة" (ma'a al-salama): As mentioned above, this is a formal way to say goodbye.
* "الله يسهل" (alla yasehel): This means "May God make it easy" and is a polite way to say goodbye, especially when someone is leaving for a journey.
* "تصبح على خير" (tasba7 3ala kheir): This means "Good night" and is a polite way to say goodbye in the evening.
The best way to say goodbye in Tunisian Arabic will depend on the situation and your relationship with the person you are talking to.
Note: Tunisian Arabic has a lot of regional variations, so you may hear other ways to say goodbye depending on the region and the speaker.