exscind [ ex- = out 出;scind = to cut 切→]v. cut out; excise 切去，切除 / A tumor was exscinded from his lung. 从他的肺部切除了一个肿块。
下面逐一探讨ex-的异体ef-与e-的构词特点。
effect [ef-(ex-) = out 出；fect= to make 做→]I v. make out; bring about 产生，招致 / The war effected changes all over the world.那场战争使整个世界都发生了变化。II n. sth. made to happen; result 结果 / The effect of the gale was to overturn several boats.刮大风的结果是翻了几条船。
effective a. 有效的；生效的
effort [ef- (ex-) = out 出;fort = force 力=>“force out 使出力气”→]n. the use of energy; trying hard 努力;艰难的尝试 / Climbing a steep hill takes effort. 爬上陡峭的山要花力气。
effortless a. 不作努力的；不费力的，容易的
educe [ e- (ex-) = out of 出;duc = to lead 引导；-e=>“to lead out of 从…引出”→]v. bring out； draw forth 引出；推断出 / The science teacher's questions educed a discussion. 自然老师提出的问题引出了一场讨论。
Reduction n. 引出；推断
educible a. 可引出的；可推断的
egress [ e- (ex-) = out 出；gress = going 走→]n. ①going out 外出，出去 / The door was locked and no other egress was possible. 门锁上了，其他出去的办法是没有的。②a way out; exit出路； 出口 / The egress was plainly marked on the doors of the theatre. 戏院的门上清楚地标着出口的记号。
eject [e-( ex-) = out of 出；ject = to throw扔→]v. ① throw out of 喷射，吐出 / The volcano ejected lava and ashes. 火山喷出岩浆与火山灰。②drive out of; expel 逐出；驱逐 / The landlord ejected the tenant who did not pay his rent. 地主把没有交地租的佃户赶走了。
ejection n .驱逐，排斥；喷出，射出
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