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

漢：
前綴extra-來源于拉丁介副詞extra,原意為outside（在...之外）在構詞中引申出beyond （超出）等意思。它主要出現在拉丁借詞之中，而這些借詞的詞干大多數成為英語中單獨作用的單詞。在現代英語中，extra-也可以作為派生前綴，一般加在形容詞之前，起修飾作用。前綴exter-,extro-，extr-是它的變體。在元音字母前變?yōu)閑xtr。此外，前綴extro意為“outwar意為“outside”，在元音字母前變?yōu)镋xtr。此外，前綴extro意為“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.從外面看，圣約翰教學像一座現代化教堂，但到里面一看就知道，這是一座古老的建筑。

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

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 引渡給，引渡 *extra (=outside),dit (=give)
例句：Germany has agreed to extradite Leeson to Singapore,where he will stand trial for fraud.德國同意將里森引渡至新加坡，在那兒，他將因詐騙罪而受到審判。

4.extradition
n. the turning over of and alleged criminal,fugitive,or porisoner by one country,state,etc. to another (國家之間對逃犯等的)引渡 *extra (=outside),dit(=give)
例句：South Korea and the U.S. signed an extradition treaty.韓國和美國簽署了一個引渡協議。

5.extraneous
adj.not related ,coming from outside 無關的；外部的 *extra (=outside)
例句：I wish we could focus on the matter and stop discussing extraneous issues.我們希望我們能集中精力討論這個問題，而停止對無關事項的討論。

6.extraordinary
adj.beyond what is usual or ordinary;arranged for a special purpose;specially employed 非常的，非凡的；特別的；臨時的；特派的 *extra (=outside),irdin (=order)
例句：Jason has an extraordinary knowledge of cars from the 1950's.賈森對20世紀50年代的汽車特別了解。

7.extravagant
adj.wasteful,in the habit of wasting money,etc.;going beyond what is reasonable,usual or conventional 奢侈的，浪費的；(思想、話語、行動)放縱的，過分的 *extra (=outside),vag(=wander)
例句：Delegates to the peace talks were treated to an extravagant meal upon arriving.前來參加和平會談的代表一到達，就應邀參加了奢侈的接待宴席。

8.extemity
n.extreme point,end ,or limit 極端，極度 *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.處于極度窮困之中的朝鮮被迫第一次向世界提出了援助請求。

9.extrinsic
adj.not a part of the real character;operating or originating from the outside;not essential 非本質的；外部的；非必需的 *extr<extra(=outside)
例句：Nervousness was one of her extrinsic characteristics.緊張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.銷售人員必須是像簡或瑪格麗特那樣的外向的人。