Formal:
* Aloha kakahiaka: This is a formal greeting, but it can also be used as a farewell. It literally means "hello morning" but is used as a general greeting or farewell.
* Aloha auinala: This is another formal greeting, used for "hello afternoon" or "goodbye afternoon."
* Aloha ahiahi: This translates to "hello evening" or "goodbye evening."
Informal:
* A hui hou: This is a common way to say goodbye, meaning "until we meet again."
* E ola: This is a more personal farewell, meaning "take care" or "stay well."
* Mahalo: This means "thank you," but it's also used as a general way of saying goodbye.
You can also add "e komo mai" to any of these phrases, meaning "come in" or "welcome," to make it more personal.
For a close friend:
* Aloha nui loa: This means "much love" and is a very affectionate way to say goodbye.
The best way to say goodbye to a friend in Hawaiian is to choose a phrase that feels right for your relationship and the situation.