Pronunciation: /swɪft /
1 Happening quickly or promptly: a remarkably swift recovery
1.1 Moving or capable of moving at high speed: the water was very swift the swiftest horse in his stable
literary except in combination
Swiftly: streams which ran swift and very clear a swift-acting poison
1 A swift-flying insectivorous bird with long, slender wings and a superficial resemblance to a swallow, spending most of its life on the wing.
Family Apodidae: several genera and numerous species, in particular the common Eurasian swift (Apus apus)
2 (also swift moth) A moth, typically yellow-brown in colour, with fast darting flight. The eggs are scattered in flight and the larvae live underground feeding on roots, where they can be a serious pest.
Family Hepialidae: Hepialus and other genera
3 A light, adjustable reel for holding a skein of silk or wool.
Old English (as an adjective), from the Germanic base of Old English swīfan 'move in a course, sweep'. The bird name dates from the mid 17th century.
Well, that's really swift
. The most common usage from my teen years isn't given: "stupid" (adjective). Slang does not always get into the official usage expressed in a dictionary. Therefore, the slang may have turned out to be too swift
(quick) in its usage to have made a lasting impression.
Words are a game. Sometimes I play alone, but you are welcome to play, too.