大学英语四级词汇pdf:2017年6月大学英语四级词汇前缀:ex-,e-,ef-,ec-

副标题:2017年6月大学英语四级词汇前缀:ex-,e-,ef-,ec-

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  前缀ex-是很重要的前缀,它来源于拉丁介词ex,意为out或out of,即表示“向外”、“分离”的倾向。作为原生词缀与拉丁介词根结合时,ex-有两个异体e-和ef-。其中,ex-用在元音字母和c,h,p,q,s,t前面;ef-只出现在f之前;e-则可以出现在b,d,g,j,l,m,n,r,v等之前。值得注意的是,ex-又可以作为派生前缀,与表示身份或职业的名词相结合,表示former (以前的,前任的)的意思。这时ex-没有异体,而且往往要带连字符。
  下面重点看一下ex-的主要意思“out”。
  1.在外边,向外
  expressly, elucidate, expedite
  2.向上,伸展地
  elated, extol, elongate
  3.尽,没有了地,火灭了地
  extinct, effete
  4.挑选,捏出,拔出
  emend, effigy
  5.去除,摆脱,使分离
  expurgate, exorbitant, extenuate
  6.彻底地,完全地,到最终,到最后,大声地,听得见地
  extant, edict
  7.表强调[非常,用力]
  exalt, efficacious, exhort
  另外,前缀ex-还会出现辅音字母同化和辅音字母脱落等变形现象。
  1.E(在辅音字母b,d,g.j.I,m,n,r,v之前]
  ebullition, editorial, egregious, ejection, eligible, emanate, enervate, eradicate,evacuation
  2.EF(在辅音字母f之前]
  efficiency, effeminate
  3、EC(在辅音字母c,l,s,t,z之前]
  eccentric, eclectic, ecstasy, appendectomy, eczema
  4.ES(在辅音字母c之前]
  escort, escapism
  5.EX(ex之后的辅音字母s脱落]
  ex( s)piration, ex(s)tirpate, ex(s)istence
  此外,前缀ex-还有一些同义前缀out-,extra-,exter,extro,它们也有“在外边(out)”的含义。
  例词:
  1.emit [(e
  vt. give off.send or send out; signal; issue paper money.etc. 散发光、热、声音、味道等,发出,发射;发出信号;发行纸币等
  emission 发射;纸币发行 emissary 使者,密使
  ex) Smoke detectors emit a waming sound when the battery is low.
  当电池电量低时,烟雾报警器会发出警告声。
  2.enumerate [(e
  vt. count a list of articles naming them one by one 逐一清点,列举
  enumeration 逐一清点,列举;细目,目录,一览表
  ex) The teacher enumerated the pupil’s mistakes before punishing him
  老师在惩罚那个学生之前先逐一列举了他所犯的错。
  3.evoke [(e
  vt. call forth or summon a spirit, etc; draw forth or elicit a particular mental image reaction, etc. 招出灵魂等;引起,唤起 evocation 唤出,唤起
  evocative 唤出的,唤起的
  ex) That song evokes pleasant high school memories for me.
  那首歌唤起了我中学时的美好回忆。
  4.exalt [(ex( =out, intensive) +alt( =high)使上得非常高]
  vt. make higher in status, power, dignity, honor, wealth, etc., praise highly; lift
  someone up 提高或提升地位、权力、品位、名誉、财膏等;赞扬;使喜悦,使得意洋洋 exaltation 提高,晋升;赞扬;得意洋洋 exalted 有品位的,高贵的
  ex)Vice Presidents are sometimes suddenly exalted to the Presidency by assassinations. 副总统偶尔会因暗杀事件而突然晋升为总统。
  5.expend [(ex( =out) +pend( =pay,weigh)支付以使某物完尽、没有了]
  vt. sth+on+sth spend; use up 使用,消费;消耗,用光 expenditure 支出,经费
  expense费用,支出;牺牲 expensive 昂贵的 expendable可花费的
  ex) About 28% of the library’s annual budget is expended on new acquisitions.
  那家图书馆年预算中的28%左右都用来购置新书。
  6.expressly [(ex (=out) +press (=press)下压挤出外边]
  adv.definitely, plainly; specially,on purpose 明白地,清楚地;特别地,故意地
  express 表达,表示;快递;明白的,明示的;快递的,快速的;快车,快件;捷运公司 expression 表达;措辞;表情 expressionism 表现主义 expressive 表现的,显示的 expressionless 无表情的,无表达的
  ex) The web site was oxpreuly created to support recently widowed women.
  那家网站是为支持那些近来失去丈夫的女性们特别创建的。
  7.extinc [(ex( =out) +tinct
  adj. no longer in existence, having died out;no longer buming, no longer active不再存在的;消亡了的,绝种的(灭绝的);(火)熄灭的,不再活跃的
  extinction 消灭,绝种;(火)熄灭,废止 extinguisher 灭火器 extinguish 熄灭(火),使消灭
  ex) Hundreds of insect species become extinct each year.
  每年都有数百种昆虫灭绝。
  8.extort [(ex( =out) +tort( =twist)扭曲使出来]
  vt. sth+from+sb obtain money, etc. from someone by threats, force, etc; exact;wrest 敲诈钱财等;强求约定、坦白等;强取,抢夺 extortion 强求,抢夺,官员的勒索钱财罪 extortionate 价格过于昂贵的,要求过高的
  ex) The Mafioso extorted money from an old widow to pay her husband’s debt.
  那个黑手党成员从一个老寡妇那里敲诈钱替她丈夫还了债。
  9.eject [(e
  vt. compel somebody to leave a place; send out liquid, etc. 撵出,驱逐;喷射液体等,排出 ejection 撵出,排 ecjector 驱逐者,排出器
  ex) After committing 5 fouls,a basketball player is electod from the game.
  篮球选手犯规五次就要被罚下赛场。
  10. elongate [(e
  v. make or become long in space 使伸长,拉长,变长 elongation 伸长,延长
  ex) Pull on soft water taffy to elongate it as it cools.
  当软水太妃糖冷却的时候用力拉它可使它变长。
  此外,前缀ex-还有一些同义前缀out-,extra-,exter,extro,它们也有“在外边(out)”的含义。
  1.emit [(e
  vt. give off.send or send out; signal; issue paper money.etc. 散发光、热、声音、味道等,发出,发射;发出信号;发行纸币等
  emission 发射;纸币发行 emissary 使者,密使
  ex) Smoke detectors emit a waming sound when the battery is low.
  当电池电量低时,烟雾报警器会发出警告声。
  2.enumerate [(e
  vt. count a list of articles naming them one by one 逐一清点,列举
  enumeration 逐一清点,列举;细目,目录,一览表
  ex) The teacher enumerated the pupil’s mistakes before punishing him
  老师在惩罚那个学生之前先逐一列举了他所犯的错。
  3.evoke [(e
  vt. call forth or summon a spirit, etc; draw forth or elicit a particular mental image reaction, etc. 招出灵魂等;引起,唤起 evocation 唤出,唤起
  evocative 唤出的,唤起的
  ex) That song evokes pleasant high school memories for me.
  那首歌唤起了我中学时的美好回忆。
  4.exalt [(ex( =out, intensive) +alt( =high)使上得非常高]
  vt. make higher in status, power, dignity, honor, wealth, etc., praise highly; lift
  someone up 提高或提升地位、权力、品位、名誉、财膏等;赞扬;使喜悦,使得意洋洋 exaltation 提高,晋升;赞扬;得意洋洋 exalted 有品位的,高贵的
  ex)Vice Presidents are sometimes suddenly exalted to the Presidency by assassinations. 副总统偶尔会因暗杀事件而突然晋升为总统。
  5.expend [(ex( =out) +pend( =pay,weigh)支付以使某物完尽、没有了]
  vt. sth+on+sth spend; use up 使用,消费;消耗,用光 expenditure 支出,经费
  expense费用,支出;牺牲 expensive 昂贵的 expendable可花费的
  ex) About 28% of the library’s annual budget is expended on new acquisitions.
  那家图书馆年预算中的28%左右都用来购置新书。
  6.expressly [(ex (=out) +press (=press)下压挤出外边]
  adv.definitely, plainly; specially,on purpose 明白地,清楚地;特别地,故意地
  express 表达,表示;快递;明白的,明示的;快递的,快速的;快车,快件;捷运公司 expression 表达;措辞;表情 expressionism 表现主义 expressive 表现的,显示的 expressionless 无表情的,无表达的
  ex) The web site was oxpreuly created to support recently widowed women.
  那家网站是为支持那些近来失去丈夫的女性们特别创建的。
  7.extinc [(ex( =out) +tinct
  adj. no longer in existence, having died out;no longer buming, no longer active不再存在的;消亡了的,绝种的(灭绝的);(火)熄灭的,不再活跃的
  extinction 消灭,绝种;(火)熄灭,废止 extinguisher 灭火器 extinguish 熄灭(火),使消灭
  ex) Hundreds of insect species become extinct each year.
  每年都有数百种昆虫灭绝。
  8.extort [(ex( =out) +tort( =twist)扭曲使出来]
  vt. sth+from+sb obtain money, etc. from someone by threats, force, etc; exact;wrest 敲诈钱财等;强求约定、坦白等;强取,抢夺 extortion 强求,抢夺,官员的勒索钱财罪 extortionate 价格过于昂贵的,要求过高的
  ex) The Mafioso extorted money from an old widow to pay her husband’s debt.
  那个黑手党成员从一个老寡妇那里敲诈钱替她丈夫还了债。
  9.eject [(e
  vt. compel somebody to leave a place; send out liquid, etc. 撵出,驱逐;喷射液体等,排出 ejection 撵出,排 ecjector 驱逐者,排出器
  ex) After committing 5 fouls,a basketball player is electod from the game.
  篮球选手犯规五次就要被罚下赛场。
  10. elongate [(e
  v. make or become long in space 使伸长,拉长,变长 elongation 伸长,延长
  ex) Pull on soft water taffy to elongate it as it cools.
  当软水太妃糖冷却的时候用力拉它可使它变长。

2017年6月大学英语四级词汇前缀:ex-,e-,ef-,ec-.doc

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