crush: implies a force that destroys all opposition or brings an operation to a halt: a rebellion that was brutally ~ed.   （halt两个意思，1.突然停止the bus screeched to a halt公共汽车嘎的一声突然停住，2.军事用语，如company, halt全连停止前进，这里用2）  operation行动也是军事用语，如operation red sea红海行动)


quell: means to overwhelm completely and to reduce to submission, inactivity, or passivity: statements intended to ~ the fears of the people.  （reduce用压倒性的力量特别是武力使屈服，如a city reduced by a month-long siege城市在被围困一个月后屈服，subdue意思是用压倒性的力量使受控制the police subdued the unruly man警方制服了那个不服管教的人）


extinguish: suggests ending something as abruptly and completely as putting out a flame: hopes for a promising life ~ed by a single bullet.

suppress: implies a conscious determination to subdue: the government ~ed all opposition newspapers.  （PRESS词根表示push压，和本组其它四个词比起来，suppress程度最轻，只是压制媒体等）


quash: implies a sudden and summary extinction: the army ~ed the rebellion.  （summary有两个意思，1. 梗概， 2. 立即，用于法律，如summary arrest立即逮捕，summary execution死刑立即执行，这里指立即消灭)


crush击溃粉碎: 指消灭一切反抗，将敌方行动终止，quell制服: 意思是使屈服静止被动，extinguish消灭: 形容消灭得突然彻底，像扑灭火一样，suppress压制: 指决意使受控制(determination=resolution坚决)，quash立即消灭:  指突然立即消灭


记忆方法:  1）首字母CQESQ分成两部分QQ和SEC，SEC是second秒的缩写，想成QQ秒杀<==消灭


         2）消灭的意思是毁灭或击败mean to bring to an end by destroying or defeating.