“Cal-um-nee” | /ˈkæləmni/
n – A false accusation or charge brought to tarnish another’s reputation or standing.
“The best way for you to defend yourself against calumny is by ignoring the false statements of others.”
From Late Middle English calumnīe (“false accusation, slander; (law) objection raised in bad faith”), borrowed from Old French calomnie (“slander, calumny”) (modern French calomnie), or directly from its etymon Latin calumnia (“false statement, misrepresentation; false accusation, malicious charge”), perhaps related to calvor (“to deceive”), ultimately from Proto-Indo-European *ḱelh₁- or *ḱh₂l-. The English word is a doublet of challenge.
The verb is derived from French calomnier (“to slander”), from Late Latin calumniāre, from Latin calumpniārī, calumniārī, present active infinitive of calumnior (“to blame unjustly, misrepresent, calumniate; (law) to accuse falsely, bring false information against”), from calumnia (see above) + -or.