a.

1. 致命的，致死的；毒性的
   This is a deadly poison.

   這是一種致命的毒藥。

2. 不共戴天的；殊死的[B]
   He is my deadly enemy.

   他是我的死敵。

3. 死一般的[B]
   There was deadly silence in the valley.

   山谷裡死一般的沉寂。

4. 【口】非常的，極度的[B]
   deadly dullness

   極度的沉悶

5. 【口】非常無聊的，令人厭煩的
   Our maths classes are pretty deadly.

   我們的數學課非常枯燥。

ad.

1. 死一般地
   His face was deadly pale.

   他的臉死一般地蒼白。

2. 非常，極度地
   The air was deadly cold.

   空氣極度寒冷。

adj.

1. causing or able to cause death.
   ▸filled with hate.
2. extremely accurate or effective.
3. informal extremely boring.
4. complete:
   she was in deadly earnest.

adv.

1. in a way that resembles or suggests death.
2. extremely.