vt.

1. 使投入；将……插入；将……刺进；使突然前倾[O]
   He plunged his sword right into the heart of his enemy.

   他将利剑直刺敌人胸膛。

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

   断电使房子陷入一片黑暗之中。

vi.

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

   男孩们跳入河里游泳。

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

   她陷入沉思。

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

   从那时起，价格猛跌。

4. （船只）颠簸；（马等）猛烈前冲
   The ship plunged about in the storm.

   那艘船在风暴中前后颠簸。

5. （女衣领口）开得很低

n.[U]

1. 跳入，冲进[S]
2. 猛跌，骤降
   Prices started a downward plunge.

   价格开始猛跌。

3. 开始从事；突然开始
4. 猛冲；（船的）颠簸

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.