Is the word Hawaii of Arabic origin?

No, the word Hawaii is of Hawaiian origin. The Hawaiian language is part of the larger family of languages called Austronesian. The closest language to Hawaiian is Tahitian. The word Hawai`i is both the name of the state (chain of islands) and the proper name of the Big Island. Elsewhere in Polynesia, Hawai`i or a cognate (Havaiki or Havaiki Nui) is the name of the underworld or of the ancestral home, but in Hawai`i the name has no meaning.