plummetting

['plʌmɪt]
n.
=plumb bob
= plumb
(钓鱼用)铅坠
重荷；压抑物
vi.
垂直落下；骤然跌落：
The damaged airplane plummeted towards the earth.
受损的飞机一头朝地面栽去。
(价格、水平等)骤然下跌；大幅落下：
House prices have plummeted in this area.
此地房价骤然大跌。