名詞 nosedive:

1. a sudden sharp drop or rapid decline
2. a steep nose-down descent by an aircraft
   同義詞：dive, nose dive

動詞 nosedive:

1. plunge nose first; drop with the nose or front first, of aircraft

1. The plane went into a nosedive.
   飛機開始俯沖。
2. Demand for oil has nosedived.
   對汽油的需求已驟減。
3. Prices have taken a nosedive.
   價格已暴跌。

nose.dive

n.（名詞）
A very steep dive of an aircraft.
俯沖：飛機的俯沖
A sudden, swift drop or plunge:
暴跌：突然的、快的下落或突入：
例句：
Stock prices took a nosedive.
股票猛跌