前缀extra-,exter-,extro- = outside;beyond

汉：
前缀extra-来源于拉丁介副词extra,原意为outside（在...之外）在构词中引申出beyond （超出）等意思。它主要出现在拉丁借词之中，而这些借词的词干大多数成为英语中单独作用的单词。在现代英语中，extra-也可以作为派生前缀，一般加在形容词之前，起修饰作用。前缀exter-,extro-，extr-是它的变体。在元音字母前变为extr。此外，前缀extro意为“outwar意为“outside”，在元音字母前变为Extr。此外，前缀extro意为“outward”。

英：
(1)extra-,exter-
only recorded in classical Latin in extraordinarius, but much used in Medieval Latin and modern formations; it represents L. extra (adv.) "on the outside, without, except," the old fem. ablative singular of exterus "outward, outside," comparative of ex "out of" (see ex-).
(2)extro-
word-forming element meaning "outwards," a variant of extra- by influence of intro-.

1.exterior
adj.outer 外部的；外面的
n.outside;outward aspect or appearance 外部，外表，外形 *exter(=outside)
例句：On the exterior St.John's like a modern church,but inside its age is apparent.从外面看，圣约翰教学像一座现代化教堂，但到里面一看就知道，这是一座古老的建筑。

2.external
adj.outside外部的，表面的，对外的
n.circumstances;outward features[pl.]外表，外部 *exter (=outside)
例句：This coat has two external pockets and three internal ones.这件外套外面有2个口袋，里面还有3个口袋。

3.extradite
v.hand over a person from the state where he is a fugitive to the state where he is alleged to have committed or has been convicted of 引渡给，引渡 *extra (=outside),dit (=give)
例句：Germany has agreed to extradite Leeson to Singapore,where he will stand trial for fraud.德国同意将里森引渡至新加坡，在那儿，他将因诈骗罪而受到审判。

4.extradition
n. the turning over of and alleged criminal,fugitive,or porisoner by one country,state,etc. to another (国家之间对逃犯等的)引渡 *extra (=outside),dit(=give)
例句：South Korea and the U.S. signed an extradition treaty.韩国和美国签署了一个引渡协议。

5.extraneous
adj.not related ,coming from outside 无关的；外部的 *extra (=outside)
例句：I wish we could focus on the matter and stop discussing extraneous issues.我们希望我们能集中精力讨论这个问题，而停止对无关事项的讨论。

6.extraordinary
adj.beyond what is usual or ordinary;arranged for a special purpose;specially employed 非常的，非凡的；特别的；临时的；特派的 *extra (=outside),irdin (=order)
例句：Jason has an extraordinary knowledge of cars from the 1950's.贾森对20世纪50年代的汽车特别了解。

7.extravagant
adj.wasteful,in the habit of wasting money,etc.;going beyond what is reasonable,usual or conventional 奢侈的，浪费的；(思想、话语、行动)放纵的，过分的 *extra (=outside),vag(=wander)
例句：Delegates to the peace talks were treated to an extravagant meal upon arriving.前来参加和平会谈的代表一到达，就应邀参加了奢侈的接待宴席。

8.extemity
n.extreme point,end ,or limit 极端，极度 *extr<extra(=outside)
例句：The extremity of North Korea's situation has for the first time forced it to ask the world for aid.处于极度穷困之中的朝鲜被迫第一次向世界提出了援助请求。

9.extrinsic
adj.not a part of the real character;operating or originating from the outside;not essential 非本质的；外部的；非必需的 *extr<extra(=outside)
例句：Nervousness was one of her extrinsic characteristics.紧张不安是她的外在特征之一。

10.extrovert
n.peron more interested in what goes on around him than in his own thoughts and felings 外向的人 *extro(=outward),vert(=turn)
例句：A sales clerk must be an extrovert like Jane or margaret.销售人员必须是像简或玛格丽特那样的外向的人。