雲（くも）は風に吹（かぜにふ）き払（はら）われた。

The clouds were driven away by the wind.

霧（きり）は、吹き払（ふきはら）う風（かぜ）が出（で）てくるまで晴（は）れないでしょう。

The fog won't clear until there's a wind to blow it away.