maliloquax

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

mălĭlŏquax, ācis, adj. [male-loquax],

evil-speaking, slanderous : lingua est maliloquax mentis indicium malae, P. Syrus in Mim. (cf. id. Sent. App. v. 267 Rib.).