discrediting

verb
  1. 1

    To harm the good reputation of a person; to cause an idea or piece of evidence to seem false or unreliable.

    โ€œThe candidate tried to discredit his opponent.โ€

noun
  1. 1

    The act by which something is discredited.

Source: https://en.wiktionary.org/wiki/discredit, https://en.wiktionary.org/wiki/discrediting