vt.

1. 缓和；使变弱；消除
   Two of these pills will deaden the ache.

   服两粒丸药就会缓解疼痛。

2. 使麻木，使无感觉
   The dentist deadened the nerve with novocaine.

   牙医用奴佛卡因麻醉神经。

3. 使（墙等）吸音（或隔音）
   Thick walls deaden noise.

   厚墙隔绝嘈杂声。

vi.

1. 变得死一般；缓和；变弱

v.

1. make (a noise or sensation) less intense.
   ▸make insensitive.
2. deprive of force or vitality.