suāvĭlŏquens

entis, adj.

suavisloquor

I. sweet-spoken, pleasant-speaking (poet.): suaviloquenti ore Cetegus, Enn. ap. Cic. Brut. 15, 58 (Ann. v. 304 Vahl.); cf. Quint. 11, 3, 31; and v. suaviloquentia; so perh. in imitation of Ennius: jucunditas, Cic. Fragm. ap. Gell. 12, 2, 7 (hence, expressly censured by Seneca as Ennian): carmen, Lucr. 1, 945.
Lewis & Short
A Latin Dictionary, 1879
An open-access project