早はや瀬せ

noun

swift current; rapids

Refers to a fast-flowing, often turbulent part of a river. Common in geographical names and descriptive writing.

• この川かわの早はや瀬せはカヌーには危き険けんだ。

  The rapids in this river are dangerous for canoes.

• 早はや瀬せを下くだるのはスリルがある。

  Going down the swift current is thrilling.