Loquacious

lo-qua-cious / lōˈkwāSHəs adjective

1. tending to speak a lot; talkative

He who seldom speaks, and with one calm well-timed word can strike dumb the loquacious, is a genius or a hero. Johann Kaspar Lavater, 1741-1801  

2. wordy

I’m probably the most loquacious author when it comes to my dedication. Karen Kingsbury, 1963-