renegade
noun [ C ] formal disapproving uk/ˈren.ɪ.ɡeɪd/ us/ˈren.ə.ɡeɪd/
叛徒；变节者；背叛者；叛教者
a person who has changed their feelings of support and duty from one political, religious, national, etc. group to a new one
A band of renegades had captured the prince and were holding him to ransom. 一群叛变分子俘获了王子，将其扣押索要赎金。