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Vine's Expository Dictionary of NT Words
"to fly" (the root of which is seen in pteron and pterux, "a wing," ptilon, "a feather," etc.), is confined to the Apocalypse, 4:7; 8:13; 12:14; 14:6; 19:17. Some mss. have the verb petaomai, a frequentative form.
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Vines, W. E., M. A. Entry for 'Fly'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/f/fly.html. 1940.