perfidious

adj. 不忠的，背信弃义的

percussionist, perdition, peregrination, peregrine, peremptorily, peremptory, peremptory writ, perennial, perennially, perestroika, perfect, perfect pitch (also absolute pitch), perfectibility, perfectible, perfection, perfectionism, perfectionist, perfectly, prefer sb to do sth., perfervid, perfidiously, perfidiousness, perfidy, perforate, perforating, perforation, perforce, perform, performance, performer, performing arts, perfume, perfumed, perfumer, perfumery, perfunctorily, perfunctoriness, perfunctory, pergola, perhaps,