godan verb (-ru), intransitive verb
Rare literary verb for flying or soaring through the air; modern Japanese normally uses 飛ぶ or 舞い上がる.
鳥が大空を飛び翔る姿は美しい。
The sight of a bird soaring through the vast sky is beautiful.
Compound of 飛び (continuative form of 飛ぶ, 'to fly') and 翔る (rare verb meaning 'to soar'). The exact historical derivation is uncertain; the spelling is conventionally associated with flying high.