maledicax
From LSJ
Latin > English (Lewis & Short)
mălĕdĭcax: (or separately, mălĕ dĭ-cax), ācis, adj. male-dicax,
I foul-mouthed, abusive, slanderous, reviling (ante- and postclass.): maledicax es, Plaut. Curc. 4, 2, 26. —
II Subst., a reviler, slanderer, Macr. S. 7, 3 med.>