prevent

英[pri'vent]美[pri'vent]

v [T]
[~ sb/sth (from doing sth) stop or hinder sb/sth] 阻止或妨碍某人/某事物

时　态：prevented,preventing,prevents

名　词：prevent'er

形容词：prevent'able,prevent'ible

同反义词

同：	[v.] forbid, foreclose, forestall, keep
反：	[v.] allow, let, permit

词义辨析

block，bar，hinder，obstruct，prevent，hamper

这些动词均含有“阻止、阻塞”之意。
block语气强烈，指有效堵住了通道，使人或物无法通过。
bar含义与block很接近，指阻塞通道或禁止出入，但有对暗示不用障碍物的阻止或禁止。
hinder语气较轻，多指阻碍、拖延人或事，强调使进展速度缓慢下来。
obstruct正式用词，语气强，多指以干扰或设置障碍的方式阻碍交通，使不能自由畅通。
prevent含义广泛，指采取预防措施或设置障碍去阻止某人或某事。
hamper侧重因受到约束或阻碍而造成的行动困难。

参考例句

A material used to prevent leakage or seepage,as around a pipe joint.
密封圈用来防止漏水或渗漏的一种材料，如水管的接合处。收藏
Prevent the misuse of obsolete documents, which shall be marked clearly.
防止作废文件的误用,对这些文件进行醒目的作废标记。收藏
Fruits and vegetables are often frozen in a syrup or vacuum-sealed to exclude air and prevent oxidation and desiccation.
水果放在糖浆或裹在干糖内冷冻，隔绝空气以防氧化和干燥。收藏
She did not actually try to shake him off, but walked at just such a speed as to prevent his keeping abreast of her.
她并没有想甩掉他，但是走得很快，使他无法跟上。收藏
To prevent food from going to waste, they even get most of their groceries out of the trash of an upscale grocery store.
为了不浪费食物，他们甚至从一个高档食品店的垃圾堆中捡回自己所用的大部分食品。收藏

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英英解释

动词解释：

keep from happening or arising; make impossible
- My sense of tact forbids an honest answer
- Your role in the projects precludes your involvement in the competitive project
[同] forbid, foreclose, forestall, preclude, prevent
prevent from doing something or being in a certain state
- We must prevent the cancer from spreading
- His snoring kept me from falling asleep
- Keep the child from eating the marbles
[同] keep, prevent
[反] allow, let, permit

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