discredit

verb (used with object)

1. to injure the credit or reputation of; defame: an effort to discredit honest politicians.
2. to show to be undeserving of trust or belief; destroy confidence in: Later research discredited earlier theories.
3. to give no credence to; disbelieve: There was good reason to discredit the witness.

noun

4. loss or lack of belief or confidence; disbelief; distrust: His theories met with general discredit.
5. loss or lack of repute or esteem; disrepute.
6. something that damages a good reputation: This behavior will be a discredit to your good name.

verb (tr)

1. to damage the reputation of
2. to cause to be disbelieved or distrusted
3. to reject as untrue or of questionable accuracy

noun

4. a person, thing, or state of affairs that causes disgrace
5. damage to a reputation
6. lack of belief or confidence