godan verb (-bu), intransitive verb
fly wildly about; fly in all directions
Describes things like birds, insects, sparks, or debris scattering and flying around in a chaotic, disorderly manner.
火の粉が乱れ飛ぶ中、消防士たちは懸命に消火活動を続けた。
Amidst the wildly flying sparks, the firefighters continued their firefighting efforts desperately.
戦場では矢が乱れ飛んでいた。
On the battlefield, arrows were flying in all directions.