perfidious

1. ADJ If you describe someone as perfidious, you mean that they have betrayed someone or cannot be trusted. 不忠的; 不可信的[文學(xué)性] [usu ADJ n]

Their feet will trample on the dead bodies of their perfidious aggressors. 他們將從背信棄義的侵略者的尸體上踏過(guò)。