voluble (adj.)

early 15c., "liable to constant change," from Middle French voluble, from Latin volubilis "that turns around, rolling, flowing," figuratively (of speech) "fluent, rapid," from volvere "to turn around, roll," from PIE root *wel- (3) "to turn, revolve." Meaning "fluent, talkative" first recorded 1580s. Related: Volubly.