happening quickly or promptly

a remarkably swift recovery

swiftly

streams that ran swift and clear

a swift-moving narrative

a swift-flying insectivorous bird with long, slender wings and a superficial resemblance to a swallow, spending most of its life on the wing

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

a light, adjustable reel for holding a skein of silk or wool