expression, godan verb (-ru)
flutter in the wind; wave in the wind
Describes something like a flag, leaf, or cloth moving lightly and repeatedly in the wind.
旗が風に翻っている。
The flag is fluttering in the wind.
木の葉が風に翻る。
The leaves flutter in the wind.
Standard kanji spelling for the expression.
Kana spelling; useful for learners or when the kanji 翻 is unfamiliar.
翻る alone means 'to flutter' or 'to turn over'; 風に翻る is a common fixed phrase specifying the wind as the cause.
A set phrase combining 風 (wind) + に (particle) + 翻る (to flutter). The verb 翻る is native Japanese.