1. [词根辨识]指出下列单词中字母组合un的含义与发音：
① university ② uninvited ③ uniformize
④ uninformed ⑤ univocal ⑥ unvoiced
2. [由此及彼]根据已知单词的词义推断出其同根词的词义。
① bicycle n.双轮自行车→unicycle n.
② cell n.细胞→unicellular a.
③ biped a.双足的→uniped a.
④ bipolar a.双极的→unipolar a.
⑤ equivocal a.多义的；含糊的→univocal a.
3. [望文生义]根据所学词根的知识推测下列单词的词义。
① reunify v.
reunification n.
② reunite v.
reunion n.
③ unidirectional a.
④ unilayer n.
⑤ unilinear a.
4. [同义相连]（提示：ax=axis；flor =flower；plan=plane；pod=foot；val=value。）
① uniaxial a.单花的
② uniflorous b.单轴的
③ unisexual c.单性的
④ univalent d.独脚的
⑤ unipod e.单价的
⑥ uniplanar f.位于同一平面的
5. [寻根问底]指出下列单词的词根并领会其词义的由来。
① disunite v.使不统一；使不和；分裂；分离
disunion n.分离；分裂；不统一；不和
disunity n.不统一；不团结
② triune a.三位一体的 n.三人一组；三个一套
triunity n.三位一体
③ universe n.宇宙；全人类；整体
universal a.宇宙的；普遍的
university n.综合性大学
④ universalism n.宇宙神教
⑤ unitarian n.唯一神教派的教徒
unitarianism n.唯一神教派
⑥ unicameral a.（议会）单院制的
⑦ unimodal a.（曲线）单峰的
⑧ unipotent a.只能向一个方向发展的
95. ven, vent [L]=to come来
在常用词convene，convenient，invent和prevent中，有一对同源异形根ven和vent，意思相当于to come（来）或to happen（发生）。ven来自拉丁动词venire的不定式词干；vent是动名词词干。
convene [con-(com-)=together一起；ven=to come来；-e→] v. come or call together;assemble 集合；召集：The committee convened every Monday.委员会每星期一开会。
▽convener [conven(e);-er n.] n.会议召集人
convention [con-;vent;-ion n.] n.会议；召集；常规
conventicle [con-;vent;-icle n.] n.集会；集会场所
convenient [con-(com-)=together一起；ven=to come来；-i-;-ent a.=having the quality有……性质的→“easy for people to come together便于人们来到一起的”→] v.① within easy reach;handy近便的；附近的：My house is in a convenient location for shopping.我住的地方上街买东西很近便。② suited to what one needs 便利的；方便的：convenient time方便的时间
▽convenience [con-;ven;-ience n.] n.便利；方便；适当的机会
event [e-(ex-)=out出；vent=to come来→“something that comes out or happens出来或出现的事情”→] n.① coming out, or result结局；结果：Those who play with fire will get burned in the event. 玩火者终将自焚。② happening;incident or occurrence事件；事变；大事：historical events历史事件
▽eventual [event;-u-;-al a.] a.最后的；结局的；可能发生的
eventuate [event;-u-;-ate v.] v.结果；归结
eventful [event;-ful a.] a.多事的；多变故的
invent [in-=upon到；vent=to come来→“to come upon来到，碰上”→] v. think up or make something new;originate or create for the first time发明；创造：The first compass was invented in China. 指南针是中国首先发明的。
▽invention [invent;-ion n.] n.发明；创造；发明物；创造力
inventive [invent;-ive a.] a.发明创造的；有创造力的
prevent [pre-=before先；vent=to come来→“to come before so act earlier先来所以早行动”→] v.① keep from happening by taking measures beforehand预防：to prevent diseases预防疾病②hinder effectually妨碍：A poor vocabulary prevents me from getting ahead.词汇量太少妨碍我进步。
▽prevention [prevent;-ion n.] n.预防；妨碍
preventive [prevent;-ive a./n.] a.预防的 n.预防措施
preventable [prevent;-able a.] a.可预防的
avenue [a-(ad-)=to到；ven=to come来；-ue n.=thing物→“way for people to come to some place让人们来到某地的路”→] n.① way to a result; the means of getting something 途径；手段：an avenue toprosperity通向繁荣的途径② road;wide street道路；大街：the Fifth Avenue in New York纽约的第五大街
intervene [inter-=between在……之间；ven=to come来；-e→] v. come between; be between 干涉；介入：I won't intervene your private affairs.我不想干涉你的私事。
▽intervenient [interven(e);-i-;-ent a.] a.干涉的；介入的
intervention [inter-;vent;-ion n.] n.干涉；介入
revenue [re-=back回；ven=to come来；-ue n.=thing物→“thing that comes back from a certain source 从某种来源收回来的东西”→] n.① income收入：one's revenue一个人的总收入 ② the income of a state国家岁入；税收：the Public Revenue国库收入
▽revenuer [revenu(e);-er n.] n.税务官
adventure [ad-=to到；vent=to come来；-ure n.=the result表结果→“the result of a coming to somebody来到某人身上的事情”→]Ⅰn.① chance机会；运气② chance one takes;risk冒险：military adven-ture军事冒险→Ⅱv.① chance or risk拿……进行冒险：He adven-tured his life to save you.他冒生命危险去救你。② risk oneself冒险：He adventured on commercial speculation.他冒险作商业投机。
▽adventurism [adventur(e) n.;-ism n.] n.冒险主义
adventurous [adventur(e) v.;-ous a.] a.爱冒险的；有危险性的
circumvent [circum-=around环绕；vent =to come来→] v.① come or move around围绕；绕行② surround so as to capture by wit围困：to circumvent enemy troops围困敌军③sidestep;keep away from回避：to circumvent the law钻法律的空子
▽circumvention [circumvent;-ion n.] n.围绕；包围；回避
