infidel
noun [ C or U ] offensive uk/ˈɪn.fɪ.dəl/ us/ˈɪn.fə.del/
（尤被基督徒和穆斯林用来互指）异教徒
(used especially between Christians and Muslims) someone who does not have the same religious beliefs as the person speaking
He lived among infidels/the infidel. 他生活在异教徒中。
infidel armies 异教徒军队
Compare: atheist nounagnostic nounnon-believerunbeliever