#词根词缀 #英语单词说文解字
20200205
ag, ac {from Latin: agere, participal: actum}
to do or to drive 做，驱使
△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
△agential［agent; -i-; -al a.］a. 代理人的；起媒介作用的
△agency［ag＝to do 做；-ency n.＝the quality or state 表性质或状态→“the ability or place of doing business 办事的能力或场所”→］n. ① power or force which causes a result 力量；作用 ② the office of an agent; service organization 代理处；机构
△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
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
∇agility［agil(e); -ity］n. 敏捷；灵活
△agitate［ag＝to drive or keep moving 驱使，使运动；-it-；-ate v.＝to make or cause 使…→“to cause to keep moving steadily 引起不断的动荡”→］v. disturb 鼓动
∇agitation［agitat(e); -ion n.］n. 鼓动；激动；不安
agitator［agitat(e); -or n.］n. 鼓动者；煽动者
△act［act＝to do 做→“to do what is required 做要求之事”→］Ⅰv. ① do sth required 行动，做某事② function 起作用③ take part in a play or film 演出，扮演→Ⅱn. ① sth done 行为／No act of kindness is ever wasted. 善有善报。② process of doing 行为过程，行动／The thief was caught in the act. 那小偷是当场被捉的。
∇actor［act v.; -or n.］n. 男演员；行动者
actress［act v.; -ress n.］n. 女演员
acting［act v.; -ing n.］n. 行为
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.＝process or result of 表过程或结果 →］n. ① process of doing, or deed 行动，活动② result of doing, or effect 作用／This experiment shows the action of an acid on metal. ③ charge 诉讼
∇actionable［action 诉讼；-able a.］a. 可控诉的
△active［act＝to do 做；-ive a.＝able to ~ 会…的 →］a. able to do 活跃的，积极的，能动的
∇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 of 表行为或事实 →］a. existing in fact；real 实际的；现实的
∇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
∇actuation［actuat(e); -ion n.］n. 驱动，激励；开动
△actuator［actuat(e); -or n.］n. ［机］促动器；传动机构
△exact［ex-＝out 出；act＝to drive 驱使→“to drive out；driven out 逼出来；逼出来的”→］Ⅰv. demand or obtain by force 强求，索取→Ⅱa. correct and without mistake 准确的；精确的
∇exacting［exact v.; -ing a.］a. 苛求的，严厉的；强索的
exaction［exact v.; -ion n.］n. 强索；勒索；榨取
exactitude［exact a.; -i-; -tude 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② do against 反动，反作用
∇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
reactant［react; -ant n.］n. ［化］反应物
△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
∇interaction［interact; -ion n.］n. 相互作用；相互
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
∇transaction［transact; -ion n.］n. 办理，处理；交易，业务
transactor［transact; -or n.］n. 办事人；处理者
20200205
ag, ac {from Latin: agere, participal: actum}
to do or to drive 做，驱使
△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
△agential［agent; -i-; -al a.］a. 代理人的；起媒介作用的
△agency［ag＝to do 做；-ency n.＝the quality or state 表性质或状态→“the ability or place of doing business 办事的能力或场所”→］n. ① power or force which causes a result 力量；作用 ② the office of an agent; service organization 代理处；机构
△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
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
∇agility［agil(e); -ity］n. 敏捷；灵活
△agitate［ag＝to drive or keep moving 驱使，使运动；-it-；-ate v.＝to make or cause 使…→“to cause to keep moving steadily 引起不断的动荡”→］v. disturb 鼓动
∇agitation［agitat(e); -ion n.］n. 鼓动；激动；不安
agitator［agitat(e); -or n.］n. 鼓动者；煽动者
△act［act＝to do 做→“to do what is required 做要求之事”→］Ⅰv. ① do sth required 行动，做某事② function 起作用③ take part in a play or film 演出，扮演→Ⅱn. ① sth done 行为／No act of kindness is ever wasted. 善有善报。② process of doing 行为过程，行动／The thief was caught in the act. 那小偷是当场被捉的。
∇actor［act v.; -or n.］n. 男演员；行动者
actress［act v.; -ress n.］n. 女演员
acting［act v.; -ing n.］n. 行为
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.＝process or result of 表过程或结果 →］n. ① process of doing, or deed 行动，活动② result of doing, or effect 作用／This experiment shows the action of an acid on metal. ③ charge 诉讼
∇actionable［action 诉讼；-able a.］a. 可控诉的
△active［act＝to do 做；-ive a.＝able to ~ 会…的 →］a. able to do 活跃的，积极的，能动的
∇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 of 表行为或事实 →］a. existing in fact；real 实际的；现实的
∇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
∇actuation［actuat(e); -ion n.］n. 驱动，激励；开动
△actuator［actuat(e); -or n.］n. ［机］促动器；传动机构
△exact［ex-＝out 出；act＝to drive 驱使→“to drive out；driven out 逼出来；逼出来的”→］Ⅰv. demand or obtain by force 强求，索取→Ⅱa. correct and without mistake 准确的；精确的
∇exacting［exact v.; -ing a.］a. 苛求的，严厉的；强索的
exaction［exact v.; -ion n.］n. 强索；勒索；榨取
exactitude［exact a.; -i-; -tude 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② do against 反动，反作用
∇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
reactant［react; -ant n.］n. ［化］反应物
△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
∇interaction［interact; -ion n.］n. 相互作用；相互
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
∇transaction［transact; -ion n.］n. 办理，处理；交易，业务
transactor［transact; -or n.］n. 办事人；处理者