名詞 deadening:

1. the act of making something futile and useless (as by routine)
   同義詞：stultification, constipation, impairment

動詞 deaden:

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

形容詞 deadening:

1. so lacking in interest as to cause mental weariness
   同義詞：boring, dull, ho-hum, irksome, slow, tedious, tiresome, wearisome

1. The dentist deadened the nerve with Novocaine.
   牙醫(yī)用奴佛卡因麻醉神經(jīng)。
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.ing

n.（名詞）
Material used for soundproofing.
消音材料：用于隔音的材料