動詞 deaden:

1. make vague or obscure or make (an image) less visible
   同義詞：dampen, damp
2. cut a girdle around so as to kill by interrupting the circulation of water and nutrients
   同義詞：girdle
3. make vapid or deprive of spirit
4. lessen the momentum or velocity of
5. become lifeless, less lively, intense, or active; lose life, force, or vigor
6. make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation
   同義詞：blunt
7. convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil

1. Her feet were deaden with cold.
   她的腳都凍得麻木了。
2. Unhappiness had deadened her to the lives of others.
   她遭遇不幸，因而對別人的生活也無動於衷。

dead.en

v.（動詞）
dead.ened,dead.en.ing,dead.ens
v.tr.（及物動詞）
To render less intense, sensitive, or vigorous:
緩和：使緊張、敏感、活力等減輕：
例句：
a medication to deaden the pain; wall tiles that deaden the sound from the rehearsal studio.
止痛的藥療法；能減弱來自彩排室聲音的墻磚

To make soundproof.
使隔音
To make less colorful or brilliant.
使無光澤，使不艷麗
v.intr.（不及物動詞）
To become dead.
死，死去
To lose vigor, brilliance, or liveliness.
失去活力，失去光澤，不快樂

【引伸】
dead.ener
n.（名詞）