infidel/ˈɪnfɪdəl; `ɪnfədl/ n(arch derog 古, 贬) person with no belief in a religion, esp in what is considered to be the true religion 不信宗教者, 无宗教信仰之人（尤指没有正统宗教信仰者）.
牛津英汉双解词典