defame somebody/something to harm somebody by saying or writing bad or false things about them (Oxford)
2. to damage the reputation of a person or group by saying or writing bad things about them that are not true (Cambridge)
The newspaper denies any intention to defame the senator’s reputation. (Oxford)
He was behind the propaganda campaign to defame his political opponent. (Cambridge)
defame reputation
propaganda campaign to defame his political opponent
Disgrace
Dishonor
Commend
Compliment
Defamatory
Defamation