Meaning 'thank you' the word 'mahalo' comes from which language?

I had a boss who was a native Hawaiian, had a great last name and ended all of his emails with mahalo.

I've had the privilege of going to Hawaii Learned a lot several years ago One must be respectful of the customs

I'm not halwu

Sounds pretty close to the greek word μπάχαλο, which means a mess, confusion.