泳およぎ出だす

godan verb (-su)

start swimming; strike out swimming

Describes the action of beginning to swim, often with a sense of moving forward into the water.

• 彼かれは川かわに向むかって泳およぎ出だした。

  He started swimming toward the river.

• 魚さかなが突とつ然ぜん泳およぎ出だすのを見みた。

  I saw the fish suddenly start swimming.