adj.不诚实的,背信弃义的;
例句:
The company was betrayed by its perfidious allies.
这家公司遭背信弃义的盟友出卖了.
Your perfidious gossip is malicious and dangerous.
你说的那些背信弃义的话是很刻毒险恶的.
The perfidious military attack on our fatherland, begun on 22 June by Hitler's Germany, is continuing.
希特勒德国于6月22日对我们的祖国发动背信弃义的武装攻击, 目前攻击还在继续进行.