(in a positive sense) Having a sweet and smooth voice; eloquent.
(in a negative sense) Indirect, delivering a message in a way that will make it seem more pleasant to the hearer(s); seductive, persuasive.
Fluent or having a ready flow of speech.
Twisting and turning like a vine.
Easily rolling or turning; having a fluid, undulating motion.
Of thoughts, feelings, or something that is expressed: expressed readily or at length and in a fluent manner.