hinder: stresses harmful or annoying delay or interference with progress: the rain ~ed our climbing.


impede: implies making forward progress difficult by clogging, hampering, or fettering: tight clothing ~d my movement.  （hamper,clog,fetter都表示阻碍阻挡，hamper泛指阻碍阻挡，clog表示"异物"阻塞使速度变慢，fetter强调使不能行动。三个词都在180622 阻碍一组中，该组中还有shackle,manacle表示"完全"阻碍阻挡，trammel表示用"网"阻碍阻挡）    


obstruct: implies interfering with something in motion or in progress by the often intentional placing of obstacles in the way: the view was ~ed by billboards. 广告牌    "挡"有两个意思，1、阻碍阻拦  2、遮掩遮挡，如本例中广告牌是被遮挡    这个词常表示遮挡或妨碍公务，如you can't park here, you're obstructing my driveway你不能在这里停车，你挡住了我家的车道，如they were charged with obstructing the police in the course of their duty他们被指控妨碍警察执行公务


block: implies the complete obstructing of passage or progress : boulders ~ed the road.

hinder阻碍: 表示烦人地干扰妨害他人前进，impede阻碍: 表示由于阻碍阻挡使前进变得困难，obstruct阻挡: 表示故意设置障碍，干扰他人前进，block完全阻挡: 指完全阻挡，不能前进通行


记忆方法: 1）首字母HIOB中HB想成湖北IO想成出入<==阻碍     "阻"从阜从且（jǔ），且是声旁。"阜"指"土山"，"且"意为"加力"。阜与且联合起来表示"需要加一把力才能翻越的土山"，即本义是"障碍物"，引申为"险要的地方"，做动词时表示"拦住挡住",如阻力阻隔阻断梗阻劝阻阻击道阻且长   "碍"，从石疑声，本义是"阻挡"，如障碍阻碍，引申为"让人不方便"，如碍事碍手碍脚，碍于情面表示难为情怕伤情面   "妨"的意思是"阻碍或伤害"，<说文>: "妨，害也，一曰碍也"，如妨碍妨害无妨不妨何

         2）阻碍的意思是干扰行动进步mean to interfere with the activity or progress of.