1. 诽谤者：detractive 减损的 | detractor 诽谤者 | detractress 女诽谤者

2. 贬低者,匪帮者：145. despot: 暴君. | 146. detractor: 贬低者,匪帮者. | 147. dictator: 独裁者.

3. 贬低者：benefactor 施主;捐助人 | detractor 贬低者 | hector 凌辱,威吓

1. 诋毁者;贬低者;诽谤者
    The detractors of a person or thing are people who criticize that person or thing.

detractor的解释

    e.g. This performance will silence many of his detractors...
           这一表演将会让很多诋毁他的人闭嘴。
    e.g. The news will have delighted detractors of the scheme.
           这条消息会让该方案的批评者感到高兴。

1. one who disparages or belittles the worth of something

    Synonym: disparagerdepreciatorknocker