vt.

1. 使投入；將……插入；將……刺進；使突然前傾[O]
   He plunged his sword right into the heart of his enemy.

   他將利劍直刺敵人胸膛。

2. 使陷入，使遭受[O]
   A power failure plunged the house into darkness.

   斷電使房子陷入一片黑暗之中。

vi.

1. 投（入）；跳（入）；衝[Q]
   The boys plunged into the river to swim.

   男孩們跳入河裡游泳。

2. 陷（入）[Q]
   She plunged deep into thought.

   她陷入沉思。

3. 下降，急降；（道路等）陡峭地下傾
   Since then prices have plunged.

   從那時起，價格猛跌。

4. （船隻）顛簸；（馬等）猛烈前衝
   The ship plunged about in the storm.

   那颼船在風暴中前後顛簸。

5. （女衣領口）開得很低

n.[U]

1. 跳入，衝進[S]
2. 猛跌，驟降
   Prices started a downward plunge.

   價格開始猛跌。

3. 開始從事；突然開始
4. 猛衝；（船的）顛簸

v.

1. fall or move suddenly and uncontrollably.
   ▸jump or dive quickly and energetically.
   ▸ (often plunge in) embark impetuously on a speech or course of action.
2. push or thrust quickly.
   ▸ (plunge someone/thing into) suddenly bring someone or something into a specified condition or state.

n.