admire [ ad- = at 對；mir = to wonder 驚奇；-e=>“to wonder at 對 …感到驚奇”→] v. regard as wonder 欽佩，贊美 / We admired the courage of the astronauts.我們對于宇航員的勇氣表示欽佩。

admiration n. 欽佩，贊美

admirable a. 令人欽佩的；極妙的

advocate [ad-=to 向；voc= to call 喊；-ate n.= person 人=>“a person who calls to 向…呼喊的人”→] n. person who speaks in favour 擁護(hù)者，提倡者 / He is an advocate of the new theory.他 是那種新理論的擁護(hù)者。

下面舉例說明ad-的異體ab-，af-，ag-等的構(gòu)詞情況，請注意詞根首字母的特點(diǎn)。

abbreviate [ ab- (ad-)=to 到;brevi = short 短;-ate v.= to make 使=>“to make short to a certain degree 使變短到某種程度”→] v. shorten (a word or phrase)縮寫；簡略 / We can abbreviate“Monday”to “Mon.”.我們可以將 Monday 縮寫成 Mon.。

abbreviation n. 縮寫；縮寫詞

affect [ af- ( ad-) = to 對；feet = to do 做=>“to do sth. to 對…做了某事”→] v. act on; produce a result on 影響 / The disease affected his memory. 那疾病影響了他的記憶力。

aggress [ ag- (ad- ) = to 向；gress = to step 跨步=>“to step to sb. 向某人逼近一步”→] v. make the first attack; begin a war 攻擊，挑釁；侵略/ Who aggressed in the fight?是誰先動(dòng)手打人的？

aggression n. 侵略 

aggressive a. 侵略的；愛尋釁的