slander;calumniate;libel;defame ;
例句:
a vicious slander on the company's good name
对那家公司良好声誉的恶意诽谤
She feels she has been much maligned by the press.
她觉得她遭到了新闻界的恣意诽谤。
There will be no mudslinging, they promise.
他们许诺不会再有诽谤了。