DEFAME

v. slander, libel, discredit, malign

For "liable", see Liability. In law, defamation is the communication of a statement that makes a false claim, expressly stated or implied to be factual, that may harm the reputation of an individual, business, product, group, government or nation. Most jurisdictions allow legal actions, civil and/or criminal, to deter various kinds of defamation and retaliate against criticism.
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Verb
1. charge falsely or with malicious intent; attack the good name and reputation of someone; "The journalists have defamed me!" "The article in the paper sullied my reputation"
(synonym) slander, smirch, asperse, denigrate, calumniate, smear, sully, besmirch
(hypernym) charge, accuse
(hyponym) assassinate
(derivation) defamation, calumny, obloquy, traducement, hatchet job

(v. t.)
To render infamous; to bring into disrepute.
  

(v. t.)
To harm or destroy the good fame or reputation of; to disgrace; especially, to speak evil of maliciously; to dishonor by slanderous reports; to calumniate; to asperse.
  

(v. t.)
To charge; to accuse.
  

(n.)
Dishonor.
  

ADJ
disgraceful| shameful