From Middle English flakeren (“to flutter, waver”), frequentative of Middle English flaken (“to move quickly back and forth”), equivalent to flack + -er. Akin to Old Dutch flakkeren (“to flicker, waver”), German flackern (“to flare, flicker, flutter”), Icelandic flökra (“to flutter”), Icelandic flakka (“to rove about”), Old English flacor (“flying, fluttering”). See also flack, flicker.
- to flutter as a bird
- And the cherubins flackered with their wings. --Ezek. x. 19 (Coverdale's translation)
- to flicker, quiver