音标：[ˈwi:kənd] ；

a. 虚弱的
v. （使）削弱, （使）变弱( weaken的过去式和过去分词 )

s. made weak or weaker

词性分布：

形容词100%

weaken的用法和样例：

例句

用作动词(v.)

Hansen says if the Gulf stream were to weaken it could affect marine life.韩森说，如果湾流太弱，会影响海洋生命。
Because transplants weaken the immune system, they cannot be performed on sick patients.由于移植会使免疫系统变弱，病人在此情况下不能施行手术。
Because transplants weaken the immune system, they cannot be performed on sick patients.由于移植会使免疫系统变弱，病人在此情况下不能施行手术。
However, as the expansion progressed and more of the land was available, the will to share started to weaken.然而，如同被促进的扩充和土地的更多是可得的一样，分享的意志开始变弱。

常见句型

用作动词(v.)

用作不及物动词S+～(+A)

His strength has weakened.他的体力下降了。
She weakened as the illness grew worse.由于病情恶化,她变得更弱了。
The enemy's attacks weakened.敌人的攻击减弱了。
They have not yet agreed to our requests but they are clearly weakening.他们还没有同意我们的要求,但态度已明显软化。

用作及物动词S+～+ n./pron.

The strain of the last few days has weakened her considerably.最近几天的劳累在很大程度上使她身体衰弱了。
The illness weakened his heart.疾病使他的心脏衰弱了。
You can weaken the tea by adding water.你可以加水把茶弄得淡一些。
None of these setbacks could weaken her resolve to become a doctor.这些挫折一点也动摇不了她要当医生的决心。

词汇搭配

用作动词 (v.)

～+名词

weaken sb's heart使某人的心脏衰弱
weaken one's tea把茶冲淡

～+副词

weaken basically基本削弱
weaken constitutionally〔materially〕体质变弱
weaken painfully痛苦地削弱
weaken permanently永久地削弱
weaken tragically悲惨地削弱

～+介词

weaken by通过…使变淡
weaken tea by adding water通过加水使茶变淡

经典引文

I must have weakened my capacity for attention and observation.
出自：Day Lewis

【近义词】

decline下降
fail失败
dilute稀释
enervate无力的
deteriorate恶化
give in屈服
cave in下陷
undermine逐渐削弱
give way撤退
damage损害
destabilize使不稳定
detract from减损
shake摇动
water down掺水
thin薄的
adulterate搀 ... 使品质变劣...
enfeeble使衰弱
exhaust使筋疲力尽
soften(使)变柔和
droop低垂
languish衰弱无力
impair损害
disable使 ... 失去能力...
fade逐渐消失
cripple跛者
depress使沮丧
water水
faint微弱的
lessen减少
sink下沉
silence沉默
loosen松开
sap树液
pine松树
flag旗
lower低的
step down逐渐缩小
de-escalate(使)逐步降级...
sabotage怠工
damp潮湿的
counteract抵制
subvert推翻
dampen(使)潮湿
countermine反地道
break打碎

【反义词】

strengthen加强

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