a
前缀a- = on,in
a
前缀a-是来源于本族语的派生前缀他原是古英语的一个介词，其意思相当于现在的on,in等。作为一个介词性前缀a-一般加在名词前，也可以加在能充当名词使用的动词之前，有时还可以加在形容词之前，所生成的派生词是句法相当于介词短语的形容词或副词值得注意的是，带有a-的形容词，在句子中多充当表语或后位定语。前缀a-除了有on,in 意思外，还有"to,at,of,for,from,out,not"(aboard,aside,asleep)等意思。另外它还有大多数前缀共有的"intensive"(arise,awake)的含义。此外，前缀a在辅音字母m,v前变形为ab-,意为"away"(amend,aversion);在辅音字母sc,sp,st前变为ad,意为"to"(ascend),aspire,astringent);作为前缀an-在辅音字母前面的省略形式，意为"not,without"(achromatic)。 1.adrift
adv./adj.not under control and driven by wind and water;afloat;loose（船在风浪中打转）漂流的；漂浮的；松开的
例句：Our boat had gone adrift sometime in the night.我们的船在晚上不知何时漂走了。
2.adroit
adj.clever,skillful,ingenious or resourceful when dealing with problems 机敏的；技术精湛的；熟练的
例句：He has led three expeditions and is known to be an adroit navigator.他已经领导了三次远航，现在是以技术精湛而闻名的航海家。
3.aghast
adj.filled with fear and surprise 惊骇的
例句：Onlookers were left aghast when the bull succeeded in goring the man.当斗牛成功地角顶撞到人时，所有的观众都惊呆了。
4.ajar
adj.slightly open(门等）微开的
例句：A window had been left ajar.有一扇窗户是半开关的。
5.alight
v.get down from a horse,bus ,etc.;come down from the air and settle 从所乘、所骑物上下来；鸟落到树上、地面上
adj.on fire;lighted up 着火的；点火的
例句：King Abjudar alighted from the helicopter and waved to the crowd.阿布朱达国王走下直升机，朝人群挥手。
6.aloof
adv.apart远离
adj.cool 冷谈的；孤零的
例句：Tom's been rather aloof since his grandfather died.祖父去世后，汤姆对任何事都漠不关心。
7.amass
v.collect;pile or heap up 聚集；收集，积聚
例句：serbs forces had amassed a huge cache of weapons during the cease-fire.在停战期间，塞尔维亚军队秘密聚积大量的武器。
8.askance
adv.with suspicion 斜视，疑心
Mrs.laFeber looked askance at the salesman.拉佛波夫人用怀疑的目光斜视前销售人员。
9.askew
adv.out of the straight or usual level position 斜歪，倾斜
例句：wind had blown the billboard askew and crew had to be called to set it straight again.风把广告牌刮歪了，不得不叫一个职员来把它重新放正。
10.amend
v.修正；改善 （表露出缺少）a- = ex- = out,extremely，mend=fault
11.Amazon
n.希腊神话中的女战士；（the~~）亚马逊河（没有乳房的）《a-(without) + mazon(breast)》
解说：希腊的传说中，有一种使希腊军队大感头痛的女性兵团，她们把妨碍她们拉弓的右乳房切除，希腊人据此传说造了这个字。1541年西班牙的探险家Orellana,对住在当时称为Rio Santa Maria de la 河流域部族中的女性的勇猛善
战，感到印象深刻，因此将此河川命名为the Amazon.
adv./adj.not under control and driven by wind and water;afloat;loose（船在风浪中打转）漂流的；漂浮的；松开的
例句：Our boat had gone adrift sometime in the night.我们的船在晚上不知何时漂走了。
2.adroit
adj.clever,skillful,ingenious or resourceful when dealing with problems 机敏的；技术精湛的；熟练的
例句：He has led three expeditions and is known to be an adroit navigator.他已经领导了三次远航，现在是以技术精湛而闻名的航海家。
3.aghast
adj.filled with fear and surprise 惊骇的
例句：Onlookers were left aghast when the bull succeeded in goring the man.当斗牛成功地角顶撞到人时，所有的观众都惊呆了。
4.ajar
adj.slightly open(门等）微开的
例句：A window had been left ajar.有一扇窗户是半开关的。
5.alight
v.get down from a horse,bus ,etc.;come down from the air and settle 从所乘、所骑物上下来；鸟落到树上、地面上
adj.on fire;lighted up 着火的；点火的
例句：King Abjudar alighted from the helicopter and waved to the crowd.阿布朱达国王走下直升机，朝人群挥手。
6.aloof
adv.apart远离
adj.cool 冷谈的；孤零的
例句：Tom's been rather aloof since his grandfather died.祖父去世后，汤姆对任何事都漠不关心。
7.amass
v.collect;pile or heap up 聚集；收集，积聚
例句：serbs forces had amassed a huge cache of weapons during the cease-fire.在停战期间，塞尔维亚军队秘密聚积大量的武器。
8.askance
adv.with suspicion 斜视，疑心
Mrs.laFeber looked askance at the salesman.拉佛波夫人用怀疑的目光斜视前销售人员。
9.askew
adv.out of the straight or usual level position 斜歪，倾斜
例句：wind had blown the billboard askew and crew had to be called to set it straight again.风把广告牌刮歪了，不得不叫一个职员来把它重新放正。
10.amend
v.修正；改善 （表露出缺少）a- = ex- = out,extremely，mend=fault
11.Amazon
n.希腊神话中的女战士；（the~~）亚马逊河（没有乳房的）《a-(without) + mazon(breast)》
解说：希腊的传说中，有一种使希腊军队大感头痛的女性兵团，她们把妨碍她们拉弓的右乳房切除，希腊人据此传说造了这个字。1541年西班牙的探险家Orellana,对住在当时称为Rio Santa Maria de la 河流域部族中的女性的勇猛善
战，感到印象深刻，因此将此河川命名为the Amazon.
