Word Study
Flacker
CIDE DICTIONARY
Flacker, v. i. [OE. flakeren, fr. flacken to move quickly to and fro; cf. icel. flakka to rove about, AS. flacor fluttering, flying, G. flackern to flare, flicker.].
To flutter, as a bird. Grose. [1913 Webster]
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