godan verb (-su), transitive verb
thrust down; push off
Forcefully push someone or something over an edge, such as a cliff, stairs, or platform. Often implies a violent or sudden action.
犯人は被害者を崖から突き落とした。
The culprit pushed the victim off the cliff.
彼は階段から突き落とされて
He was pushed down the stairs and got injured.