denigrate

/หˆdษ›n.ษช.ษกษนeษชt/
verb
  1. 1

    To criticise so as to besmirch; traduce, disparage or defame.

  2. 2

    To treat as worthless; belittle, degrade or disparage.

    โ€œYou have no right to denigrate people and things that you have no personal experience with.โ€

  3. 3

    To blacken.

Source: https://en.wiktionary.org/wiki/denigrate