隱蔽待機以出其不意;伏擊;埋伏以待
lie in wait (for sb)
to hide, waiting to surprise, attack or catch sb
He was surrounded by reporters who had been lying in wait for him.他被暗中守候他的記者團團圍住。
釋義來自《牛津高階英漢雙解詞典》第 9 版