discredit

1. V-T To discredit someone or something means to cause them to lose people's respect or trust. 使…丧失信誉

...a secret unit within the company that had been set up to discredit its major rival. …为破坏其主要竞争对手声誉而设的一个公司内秘密单位。

2. discreditedADJ 名誉扫地的

The previous government is, by now, thoroughly discredited. 上届政府至今彻底名誉扫地。