Correct spelling for the English word "Cosen" is [kˈə͡ʊzən], [kˈəʊzən], [k_ˈəʊ_z_ə_n] (IPA phonetic alphabet).
The word "cosen" is derived from the Middle English word "cosin", which originated from Old French "cousin". It ultimately traces back to the Latin word "consobrinus", meaning "mother's sister's child" or "father's brother's child". In its original form, the term referred specifically to a relative or kinsman, but over time, it expanded to include a broader range of family relationships.