block, bar, hinder, obstruct, prevent, hamper

動詞 prevent:

1. keep from happening or arising; make impossible
   同義詞：forestall, foreclose, preclude, forbid
2. prevent from doing something or being in a certain state
   同義詞：keep

1. The government tried to prevent the diminution of resources.
   政府試圖阻止資源的減少。
2. Props were used to prevent the roof collapsing.
   用了一些支柱以防止屋頂塌落。
3. The car came to a halt just in time to prevent an accident.
   汽車及時停下，避免了一場車禍。
4. The policy is designed to prevent the predominance of one group over another.
   該政策旨在防止一些人壓制另一些人。
5. They painted a coat of paint to prevent the oxidation of the ship by seawater.
   他們刷了一層油漆以防止船只被海水氧化。
6. Strove to prevent our courage from turning into bravado.
   努力預(yù)防我們的勇氣變成一種虛張聲勢
7. These regulations are intended to prevent accidents.
   這些規(guī)章制度旨在防止事故發(fā)生。
8. What can we do to prevent the disease spreading?
   我們能做什么來防止這種疾病蔓延呢？

pre.vent

v.（動詞）
pre.vent.ed,pre.vent.ing,pre.vents
v.tr.（及物動詞）
To keep from happening:
預(yù)防：使防止發(fā)生：
例句：
took steps to prevent the strike.
采取步驟避免罷工

To keep (someone) from doing something; impede:
阻礙：使（某人）不做某事；阻撓：
例句：
prevented us from winning.
阻撓我們獲勝

Archaic To anticipate or counter in advance.
【古語】 預(yù)先應(yīng)付：事先預(yù)料或遇到
Archaic To come before; precede.
【古語】 在…之前：在…之前來；先于
v.intr.（不及物動詞）
To present an obstacle:
阻撓，阻止：呈現(xiàn)出阻礙：
例句：
There will be a picnic if nothing prevents.
如果沒有特別的情況，我們將舉行野餐

來源：
Middle English preventen [to anticipate]
中古英語 preventen [預(yù)料，預(yù)期]
from Latin praevenore praevent-
源自 拉丁語 praevenore praevent-
prae- [pre-]
prae- [前綴，在…之前]
venore [to come] * see g w3-
venore [來] *參見 g w3-

【引伸】
prevent.abil.ity 或
prevent.ibil.ity
n.（名詞）
prevent.able 或
prevent.ible
adj.（形容詞）
prevent.er
n.（名詞）
<參考詞匯><同義詞>prevent,preclude,avert,obviate,forestallThese verbs mean to stop or hinder something from happening, especially by advance planning or action.
這些動詞是指停止或阻撓某事的發(fā)生，尤指以預(yù)先的計劃或行動來阻撓
Prevent implies anticipatory counteraction:
Prevent 指預(yù)先阻止：
例句：
.The surest way to prevent war is not to fear it. (John Randolph).Topreclude is to exclude the possibility of the occurrence of an event or action:
.阻止戰(zhàn)爭最有把握的方法是不要害怕. （約翰·倫道夫）。Preclude 指排除某事或行為發(fā)生的可能性：

例句：
.a tranquillity which . . . his wife`s presence would have precluded. (John Henry Newman).Toavert is to ward off something about to happen:
.他妻子的出現(xiàn)使寧靜成為不可能. （約翰·亨利·紐曼）。Avert 是指阻止將要發(fā)生的事情：

例句：
Only quick thinking on the pilot`s part averted a disastrous accident.
只有這位飛行員的機智才能阻止這樣可怕事件的發(fā)生。

Obviate implies that something,such as a difficulty, has been anticipated and disposed of effectively:
Obviate 暗指某物，如困難已經(jīng)被預(yù)料到且被有效地排除掉：
例句：
.the objections . . . having . . . been obviated in the preceding chapter. (Joseph Butler).
.反對意見…已經(jīng)…在前一段時間被排除了. （約瑟夫·巴特勒）。

Forestall usually suggests anticipatory measures taken to counteract, neutralize, or nullify the effects of something:
Forestall 通常指預(yù)先采取措施來消除，中和或抵消某事的后果：
例句：
We installed an alarm system to forestall break-ins.
我們安裝了一套警報系統(tǒng)來預(yù)防小偷的闖入