Correct spelling for the English word "haith" is [hˈe͡ɪθ], [hˈeɪθ], [h_ˈeɪ_θ] (IPA phonetic alphabet).
The word "haith" originates from Old English, where it was spelled "hǣþ" or "hǣð". The term can be traced back to the Germanic language family, specifically the West Germanic branch. It is ultimately derived from the Proto-Germanic word "haiti" or "haitiz", which means "command" or "order".