An Etymological Dictionary of the German Language/flügge

by Friedrich Kluge

flügge, adj., ‘fledged,’ a LG. form for the strictly HG. flücke, MidHG. vlücke, OHG. flucchi, ‘able to fly.’ Akin to MidDu. vlugghe, with LG. permutation, E. fledged; prop. a verbal adj. from fliegen, with the meaning ‘capable of flying.’