転ころげ込こむ

godan verb (-mu), intransitive verb

roll into; tumble into

Describes physically rolling or tumbling into a place, often with a sense of sudden or uncontrolled entry.

• ボールが溝みぞに転ころげ込こんだ。

  The ball rolled into the ditch.

• 彼かれは急きゅうに部屋へやに転ころげ込こんできた。

  He suddenly tumbled into the room.