discredit

Discrediting or disbelieving.

A person or thing that causes harm to a reputation, as of a person, family, or institution.

The state of being discredited or disbelieved.

“Later accounts have brought the story into discredit.”

A degree of dishonour or disesteem; ill repute; reproach.

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

“The candidate tried to discredit his opponent.”