lo·qua·cious (lō-kwā'shəs) adj. Very talkative; garrulous.
[From Latin loquāx, loquāc-, from loquī, to speak; see tolkw- in Indo-European roots.] lo·qua'cious·ly adv., lo·qua'cious·ness, lo·quac'i·ty (lō-kwās'ĭ-tē) n.
1667, from stem of L. loquax (gen. loquacis) "talkative," from loqui "to speak," of unknown origin. Loquacity is much earlier (12c.), from L. loquacitatem "talkativeness," from loquax.