Correct spelling for the English word "usaian" is [jˈuːze͡ɪən], [jˈuːzeɪən], [j_ˈuː_z_eɪ_ə_n] (IPA phonetic alphabet).
The word "USAian" is a term used to refer to someone from the United States of America. However, it is not widely recognized or officially recognized as a standard demonym. The etymology of "USAian" is derived from the initials of the United States of America, "U.S.A"., with the suffix "-ian" added to indicate someone from that country. It is a creative linguistic construction that has emerged as an alternative to terms like "American" due to the ambiguity of that word, which can refer to the entire continent of America.