noun, feminine/ka.lɔm.ni/plural: calomnies
calumny; slander
“Le monde est cruel, Emma. Partout où nous eussions été, il nous aurait poursuivis. Il vous aurait fallu subir les questions indiscrètes, la calomnie, le dédain, l'outrage peut-être.” — The world is cruel, Emma. Wherever we might have gone, it would have persecuted us. You would have had to put up with indiscreet questions, calumny, contempt, insult perhaps.
Learned borrowing from Latin calumnia. Doublet of challenge.