I. ˈswift adjective
Etymology: Middle English, from Old English; akin to Old English swīfan to revolve — more at swivel
Date: before 12th century
1. : moving or capable of moving with great speed
a swift runner
2. : occurring suddenly or within a very short time
a swift transition
3. : quick to respond : ready
Synonyms: see fast
II. adverb
Date: 14th century
: swiftly
swift -flowing
III. noun
Date: 15th century
1. : any of several lizards (especially of the genus Sceloporus ) that run swiftly
2. : a reel for winding yarn or thread
3. : any of numerous small plainly colored birds (family Apodidae) that are related to the hummingbirds but superficially much resemble swallows