* S'gwaay: This is a general greeting meaning "good day" or "how are you?" It's a common greeting used in a variety of situations.
* S'gwaay guu s't'uung (pronounced roughly "s'gway goo s'toon"): This translates to "good day to you." This is a slightly more formal greeting than "s'gwaay."
* S'gwaay hiis s't'uung: This translates to "good day to all of you." This is a greeting used when addressing multiple people.
Ultimately, the best Haida translation for "hello" depends on the specific context and the relationship between the speakers.