means To whisk is to move something briskly and lightly—or, with the kitchen tool of the same name, to beat air into eggs, cream, or batter with quick sweeping strokes.

from From a Scandinavian source—compare Old Norse 'visk,' a wisp or small bundle of grass or straw, the kind of thing you'd sweep or flick with. The word entered English by the late Middle Ages, carrying that sense of a quick, sweeping motion; the bundle-of-straw idea explains both the cooking implement and the broom-like 'whisk.' It's likely a cousin of words in German and Dutch for wisps and bundles, all sharing the notion of something light, brushy, and briskly waved.