备考资料：托福考试词汇研究－Unit4b

auscultation n.听诊 [auscultatio auscultare listen to]

auspice n.前兆;赞助;资助 [under the ~s of the company = under the company orig'observation of bird-flight in divination':auspex] [observer avis bird.

auspicate [开张;开幕式]

auspicious a.幸运的 [(auspice 的形容词)an ~ sign 吉兆 auspicial 占卜的;幸运的]

austere a.苛刻的 [austeros severe austerity严格,朴素;节约生活]

austral a.南方的;向南的 [ australis Auster south wind]

authentic a.可信的,确实的,真正的 [autentique authentikos principal,genuine]

authenticate v.证实;鉴定;使生效 [medL authenticare: AUTHENTIC确实的,可信的]

authoritative a.权威的;可靠的 [authorization 授权;委任;认可,授权书]

authorize v.授权;委任;认为正当 [auctor: AUTHOR authoritative权威的authorization授权]

autocrat n.独裁者 [AUTO-, kratos power autocracy独裁政治]

autodidact n.自学者 [AUTO- + didact as DIDACTIC]

automatism n.自动;自动作用 [automate AUTOMATON自动机械装置;机器人(robot)]

automaton n.自动机器;机器人 [ neut of automatos acting of itself: AUTO-automatism自动]

autonomous a.自主的 [AUTONOMY自制,自制团体 auto自己+nomous法律]

autopsy n.验尸 [ autopsie or modL autopsia autoptes eye-witness]

autotelic a.自己本身具有目的的 [AUTO- + Gk telos end]

auxiliary n.a.帮助者;辅助的 [ auxiliarius auxilium help]

avail v.利益;效用 [vail (v.)  valoir be worth  valere]

avalanche n.雪崩;涌至 [alt of dial lavanche after avaler descend]

avarice n.贪婪 [avaritia avarus greedy avaricious贪婪的]

avatar n.神之化身;具体化 [avatara descent down+tr- pass over]

avenge v.报仇;复仇 [ vindicare vindicate("要求")证明<某人>无辜或清白]

aver v.断言 [ averer(AD-,  verus true) averment 断言,主张;申辩]

averse a.不愿意的;反对的 [ aversus(AVERT)aversion嫌恶,反感;讨厌的人]

avert v.避开;掉开 [ avertere(AB-, vertere vers- turn): partly avertir Rmc]

aviary n.鸟的小屋;禽舍 [avi鸟+ary场所 aviatrix女飞行员 avian 鸟类的]

aviate v.用飞机飞行 [back-form.  AVIATION]

aviculture n.养鸟;鸟类饲养 [  avis bird, after AGRICULTURE]

avid a.贪婪的;渴望的 [  avide or avidus avere crave]

avocation n.副业;嗜好 [  avocatio avocare call away]

avouch v.保证;确说 [ avochier advocare(AD-, vocare call)]

avow v.公开承认 [avouer acknowledge(AD-, vocare call) avowal声明,承认]

avuncular a.如叔(伯)父的 [ avunculus maternal uncle, dimin of avusgrandfather]

await v.等待;准备作...之用 [AD-, waitier WAIT]

awe n.敬畏 [awe-inspiring令人起敬畏心(恐怖心)的]

awhile ad.暂时;暂且 [ ane hwile a while]

awning n.雨篷;凉篷 [awning window 遮蓬窗 awn(麦等之)芒(beard)]

awry ad.歪;斜;错误地 [A+WRY(一时)不高兴的;皱眉的;讽刺的]

axiom n.定理 [axios worthy axiomatic公理的;格言的]

axiomatic a.公理的;通则的 [axiom(数学逻辑)公理 axiom of choice (数)选择公理]