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.
ボールが溝に転げ込んだ。
The ball rolled into the ditch.
彼は急に部屋に転げ込んできた。
He suddenly tumbled into the room.
Standard kanji spelling.
Mixed kana-kanji spelling sometimes seen in informal writing.
Compound of 転げる (korogeru, 'to roll') + 込む (komu, 'to go into'). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'to roll into'.