noun, noun or participle which takes 'suru', transitive verb
Literary and formal term for making false and damaging statements about someone. Rare in everyday speech; more common legal or formal equivalents include 名誉毀損 (めいよきそん) or 中傷 (ちゅうしょう).
彼は政敵を讒謗したとして訴えられた。
He was sued for slandering his political opponent.
その記事は明らかな讒謗にあたる。
That article clearly constitutes defamation.