Question

1. ag, act [L]=

Accepted Answer

to do, to drive 做，驱使
词根ag 来自拉丁动词agere 的词干部分，意思相当于英语的to do（做）或to drive（驱使）。
act 是个英语核心单词，其实它的前身act 是ag 的同源异形词根，来自agere 的动名词形式
actum 的词干部分，基本含义也是to do 或to drive。下面先分析几个由ag 构成的常见派生
词。

agent [ag=to do 做；-ent n.=person 人→“person who does 办事者”→] n. person who works for
another person or organization 代理人：a sales agent 代售商

▽agential [agent;-ial a.] a.代理人的；起媒介作用的

agency [ag=to do 做；-ency n.=the quality or state of 表性质或状态→“the abiliy or place of
doing business 办事的能力或场所”→] n.①power or force which causes a result 力量；作用：
human agency 人力② the office of an agent;service organization 代理处；机构：travel agency
旅行社

agenda [ag=to do 做；-enda（-a 表复数）n.=things 事情→“things to be done 要办的事项”
→] n. list of things to be discussed or decided upon 议事日程：the most important item on the
agenda 议事日程的首项

agile [ag=to do 做；-ile a.=able 能……的→“able to do 能干的”→] a. able to do or move quickly
or easily 敏捷的；灵活的：as agile as a monkey 像猴子般灵活

▽agility [agil(e);-ity] n.敏捷；灵活

agitate [ag=to drive or keep moving 驱使，使运动；-itate（-ate）v.=make or cause 使……→“cause
to keep moving steadily 引起不断的动荡”→] v. disturb 鼓动：The audience were agitated by his
speech 听众被他的演说所鼓动。

▽agitation [agitat(e);-ion n.] n.鼓动；激动不安
agitator [agitat(e);-or n.] n.鼓动者

以下介绍的是几个常用act 的同根词。

act [act=to do 做→“to do what is required 做要求的事”→] v. ① do something 行动：to act
at once 立刻行动② function 起作用：The brakes wouldn't act.刹车失灵。③ take part in a play
or film 扮演：Who is acting Hamlet? 谁演哈姆雷特？

▽actor [act;-or n.] n.男演员；行动者
actress [act (o)r;-ess n.] n.女演员
re-act [re-;act v.] v.重做，再做；重演，再演
overact [over-;act v.] v.演得过于夸张

action [act=to do 做；-ion n.=the process or result 表过程或结果→] n.① process of doing, or
deed 行动，活动：Actions speak louder than words.行动比语言更有说服力。② result of doing,
or effect 作用：the action of an acid on metal 酸对金属的作用③ charge 诉讼：to bring an
action against someone 起诉某人

▽actionable [action;-able a.] a.可控诉的
active [act=to do 做；-ive a.=able 会……的→] a. able to do 活跃的，积极的：Although he is over
70, he is still active.他虽然年过70，但依然很活跃。

▽activate [activ(e);-ate v.] v.使活动
activism [activ(e);-ism n.] n. [哲] 能动主义；积极，活跃
activist [activ(e);-ist n.] n.活动分子，积极分子
activity [activ(e);-ity n.] n.能动性；活跃；[复] 活动

actual [act=to do 做；-u-;-al a.=the act or fact 表行为或事实→] a. existing in fact;real 实际的；
现实的：the actual amount of money 实际金额

▽actualist [actual;-ist n.] n.现实主义者
actuality [actual;-ity n.] n.事实，现存情况；现实性
actualize [actual;-ize v.] v.实行，使现实化

actuate [act=to do 做；-u-;-ate v.=to make or cause 使……→] v. cause to do 驱动，激励：What
motives actuated her? 什么动机驱使她这样做的？

▽actuation [actuat(e);-ion n.] n.驱动，激励；开动

exact [ex-=out 出；act=to drive 驱使→“to drive out;driven out 逼出来（的）”→] I v. demand or
obtain by force 强求，索取：He exacted obedience from his students.他强要学生服从他。→
Ⅱ a. correct and without mistake 准确的，精确的：to be exact in conduct 行为一丝不苟

▽exacting [exact v.;-ing a.] a.苛求的，严厉的；强索的
exaction [exact v.;-ion n. ] a.强索；勒索；榨取
exactitude [exact a.;-itude n.] n.精确（性）；严格，严谨

react [re-=back 回返；act=to do 做→] v.① do or act in reply 反应：She was slow to react.她反
应迟钝。② do against 反动，反作用：to react against oppression 反抗压迫

▽reaction [react;-ion n.] n.反应；反作用；反动
reactor [react;-or n.] n.引起反应的人或物；[原] 反应堆
reactive [react;-ive a.] a.反应的；反动的

interact [inter-=between 在……之间；act=to do 做→“to do between two things 在两者之间互
动”→] v. have an effect on each other 互相作用，互相影响：All things are inter-related and
interacted on each other.一切事物都是互相联系又互相影响的。

▽interaction [interact;-ion n.] n.相互作用；相互
interactant [interact;-ant n.] n. [化] 反应物
interactive [interact;-ive a.] a.互相作用的；[计] 交互的

transact [trans-=across or through 穿过；act=to drive 驱使→“to drive through 使通过”→] v.
carry on;manage 执行，办理：He transacted some businesss at bank.他在银行处理了一些事务。

▽transaction [transact;-ion n.] n.办理，处理；交易，业务
transactor [transact;-or n.] n.办事人，处理者

N Act Drive V Ag=To Act=To Agency Result