The spelling of "hysa" may seem confusing at first glance, but with the help of IPA phonetic transcription, it becomes clear. The word is pronounced /ˈhuːsa/ with a long "u" sound, as in "hoot." The "y" in "hysa" serves as a vowel and makes the "i" sound as in "in." Therefore, the correct spelling is "h-u-s-a," with the "y" acting as a substitute for the "i" sound. Paying attention to the individual sounds of words can often help with spelling confusion.