CALUMNIOUS
calumniatory, calumnious, defamatory, denigrative, denigrating, denigratory, libellous, libelous, slanderous
(adjective) (used of statements) harmful and often untrue; tending to discredit or malign
Source: WordNet® 3.1
Etymology
Adjective
calumnious (comparative more calumnious, superlative most calumnious)
Possessing the traits of calumny.
Synonyms
• See also defamatory
Source: Wiktionary
Ca*lum"ni*ous, a. Etym: [L. calumniosus.]
Definition: Containing or implying calumny; false, malicious, and injurious
to reputation; slanderous; as, calumnious reports.
Virtue itself 'scapes not calumnious strokes. Shak.
Syn: Slanderous; defamatory; scurrilous; opprobrious; derogatory;
libelous; abusive.
Syn: -- Ca*lum"ni*ous*ly, adv.
– Ca*lum"ni*ous*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition