keel over
phrasal verb with keel verb uk/kiːl/ us/kiːl/
(PERSON)
突然倒下
to fall over suddenly
He finished the bottle, stood up to leave, and keeled over. 他喝完了那瓶酒，起身离开时突然跌倒在地。
(BOAT)
（船）倾覆
If a boat keels over, it turns upside down in the water.
The storm raged and they struggled to stop the boat from keeling over. 风暴肆虐，他们努力使船免于倾覆。