calumny (n.)
"False & malicious misrepresentation of the words or actions of others, calculated to injure their reputation" [Fowler], mid-15c., from Middle French calomnie (15c.), from Latin calumnia "trickery, subterfuge, misrepresentation, malicious charge," from calvi "to trick, deceive," from PIE root *kel- (6) "to deceive, confuse" (cognates: Greek kelein "to bewitch, seduce, beguile," Gothic holon "to deceive," Old Norse hol "praise, flattery," Old English hol "slander," holian "to slander").