Formal:
* बिदा हुनुहोस् (bida hunuhos) - This is the most formal way to say goodbye. It literally means "May you be free".
* अलविदा (alvida) - This is also a formal way to say goodbye, borrowed from the Hindi language.
Informal:
* चल्नुहोस् (chalnuhos) - This means "go" and is used in a casual setting with friends or family.
* जाने (jane) - This means "going" and is another casual way to say goodbye.
* भेट्नुहोस् (bhetnuhos) - This means "meet you" and is a friendly way to say goodbye, implying you'll see the person again soon.
* सुनौला (sunaula) - This is a very informal way to say goodbye, mostly used among close friends. It means "good luck".
Other options:
* राम्रो हुनुहोस् (ramro hunuhos) - This means "take care" and is a polite way to say goodbye.
* शुभकामना (shubhakamana) - This means "best wishes" and is a formal way to say goodbye when you wish someone well.
The best way to say goodbye in Nepali depends on the situation and the person you are speaking to.