depreciator

/dɪˈpriːʃiˌeɪtər/
noun
  1. A person who criticizes or belittles someone or something, reducing their perceived value.
    • The constant depreciator in the group made everyone feel discouraged.
    • She ignored the depreciators and continued working on her invention.
    • Online forums sometimes attract depreciators who post negative comments.
Antonyms
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