disparager

1. For the honor of La Francaise Duroy was forced to challenge his disparager to a duel.
   为了《法兰西生活》的荣誉，杜洛瓦不得不向诋毁他的人提出决斗。
2. Duroy was forced to challenge his disparager to duel.
   杜洛瓦不得不向诋毁他的人提出决斗。

noun

1. one who disparages or belittles the worth of something

   Synonym:    detractordepreciatorknocker