voluble

Short definition from Wiktionary

Adjective

1. 1
   Fluent or having a ready flow of speech.
2. 2
   Of thoughts, feelings, or something that is expressed: expressed readily or at length and in a fluent manner.
3. 3
   Easily rolling or turning; having a fluid, undulating motion.
4. 4
   Twisting and turning like a vine.