speaking harmoniously or sweetly
• (a.) Speaking sweetly or harmoniously.
Mel·lil'o·quent adjective [ Latin mel , mellis honey + loquens speaking, present participle of loqui to speak.] Speaking sweetly or harmoniously. 
melliloquent, melliloquence, melliloquently 1. Speaking sweetly or harmoniously. 2. Literally, `honey-tongued”; a glib or fluent speaker. 3. Pertaining to a smooth talker or a con artist.