I. (ˌ)dis-ˈkre-dət transitive verb
Date: 1559
1. : to refuse to accept as true or accurate : disbelieve
discredit a rumor
2. : to cause disbelief in the accuracy or authority of
a discredit ed theory
3. : to deprive of good repute : disgrace
personal attacks meant to discredit his opponent
II. noun
Date: 1565
1. : loss of credit or reputation
I knew stories to the discredit of England — W. B. Yeats
2. : lack or loss of belief or confidence : doubt
contradictions cast discredit on his testimony