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。
- A fallen tree is blocking the road.
一棵倒下的树挡住了路。 - As she left the court, an angry crowd tried to block her way.
她离开法庭的时候，愤怒的人群试图阻挡她的去路。
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。
- The centre of the town was barred to football supporters.
镇中心不准球迷进入。 - The incident led to him being barred from the country/barred from entering the country.
这起事件导致他被禁止进入该国。 - I tried to push past her but she barred my way/path (= stood in front of me and prevented me from getting past).
我试图从她旁边挤过去，但她还是挡住了我的去路。
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。
- High winds have hindered firefighters in their efforts to put out the blaze.
大风妨碍了消防队员扑灭大火。 - Her progress certainly hasn't been hindered by her lack of experience.
经验不足当然没有妨碍她的进步。
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。
- After the earthquake many roads were obstructed by collapsed buildings.
地震过后，许多道路都被倒塌的建筑物堵住了。 - Her view of the stage was obstructed by a pillar.
一根柱子挡住了她的视线，她看不见舞台。 - An accident is obstructing traffic on the M11.
一场事故堵塞了11号高速公路上的交通。 - to obstruct a police investigation
阻挠警方的调查 - He got five years in prison for withholding evidence and obstructing the course of justice.
他因隐藏证据、妨碍司法而被判入狱5年。 - He was charged with obstructing justice.
他被控以妨碍司法公正。
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。
- Label your suitcases to prevent confusion.
在你的手提箱上贴上标签以防弄混。 - His disability prevents him (from) driving.
他有残疾，不能开车。
hamper : 侧重因受到约束或阻碍而造成的行动困难。
- Fierce storms have been hampering rescue efforts and there is now little chance of finding more survivors.
猛烈的暴风雨妨碍了救援工作的进行，现在找到更多生还者的希望已经很渺茫了。
