1.anesthesia (=美anaesthesia) n.麻醉(loss of sensation)
词根记忆：an(无)+esthe(感觉)+sia--无感觉--麻醉
例:Surgical patients operated on at night need less anesthesia.
同根词：anesthetic(a．麻醉的；n.麻醉剂)：aesthetics(n.美学)
2.animate n.有生命的(alive)；v.使有生气(to give spirit and support to);绘制（动画片）(to make or design in such a way as to create lifelike movement)
联想记忆：anim(生命)+ate--使图画有生命--绘制（动画片）
例:animated cartoon动画
3.animosity n.憎恶，仇恨(enmity)
联想记忆：anim(生命)+osity--用整个生命去恨--憎恶，仇恨
例:Much animosity existed between the two opponents.
4.announce v.宣布，发表(to proclaim)；通报…的到来(to give notice of the arrival)
词根记忆：an+nounce(讲话，说出)--说出来--宣布
例:The OPEC had long been expected to announce a reduction in output to bolster sagging oil prices.
派生词:announcement(n.公告；发表)
同根词：renounce(v.宣布放弃)
5.announcement n.宣告(the act of announcing or of being announced);公告，通告(a public notification or declaration)
词根记忆：来自announce(v.宣布；述说)
例:The following appeared in an announcement issued by the publisher of The Mercury a weekly newspaper.
同根词：denouncement(n.公开谴责，抨击)
6.anole n.变色龙（产于美洲的蜥蠕类）(a kind of lizard with the ability to change color)
例:anole lizard species变色蜥蜴种群
7.anomaly n.异常，反常(deviation from the common rule)
联想记忆：a（不）+nomal(看作normal正常的)+y--不正常--反常
例:The test results contained anomalies that the scientists could not explain.
派生词:anomalous(a.异常的，不规则的)
8.anonymous a.匿名的(unnamed)
词根记忆：an(无)+onym(名称)+ous--无名称的--匿名的
例:An anonymous donor gave a million dollars to the charity.
同根词：synonym(n.同义词)
9.answerable a.(to)应负责的( responsible)
词根记忆：来自answer(v.回答，尽责)
例:I am answerable to the company for the use of this equipment.
10. antagonism n.对抗，敌对(opposition, hostility)
词根记忆：ant(反)+agon(打斗，比赛)+ism--对着打--对抗
例:Randolph helped to weaken organized labors antagonism toward Black workers.
同根词：antagonise(v.使反抗，使敌对)；antagonize(v.对抗)：antagonist（n.敌手，对手）