The Collaborative International Dictionary of English v.0.48:
Swiftly \Swift"ly\, adv. In a swift manner; with quick motion or velocity; fleetly. --Wyclif. [1913 Webster]WordNet (r) 3.0 (2006):
swiftly adv 1: in a swift manner; "she moved swiftly" [syn: swiftly, fleetly]