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From Middle English flakeren (to flutter, waver), frequentative of Middle English flaken (to move quickly back and forth). 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.


flacker (third-person singular simple present flackers, present participle flackering, simple past and past participle flackered)

  1. to flutter as a bird
    And the cherubins flackered with their wings. --Ezek. x. 19 (Coverdale's translation)
  2. to flicker, quiver