单词：a-
pref. 不, 缺少, 无
[医] 不, 无, 缺; 离
[医] 不, 无, 缺; 离
A, as a prefix to English words, is derived from various sources.
(1) It frequently signifies on or in (from an, a forms of AS. on),
denoting a state, as in afoot, on foot, abed, amiss, asleep, aground,
aloft, away (AS. onweg), and analogically, ablaze, atremble, etc. (2)
AS. of off, from, as in adown (AS. ofd/ne off the dun or hill). (3) AS.
a- (Goth. us-, ur-, Ger. er-), usually giving an intensive force, and
sometimes the sense of away, on, back, as in arise, abide, ago. (4) Old
English y- or i- (corrupted from the AS. inseparable particle ge-,
cognate with OHG. ga-, gi-, Goth. ga-), which, as a prefix, made no
essential addition to the meaning, as in aware. (5) French a (L. ad
to), as in abase, achieve. (6) L. a, ab, abs, from, as in avert. (7)
Greek insep. prefix / without, or privative, not, as in abyss, atheist;
akin to E. un-.
(1) It frequently signifies on or in (from an, a forms of AS. on),
denoting a state, as in afoot, on foot, abed, amiss, asleep, aground,
aloft, away (AS. onweg), and analogically, ablaze, atremble, etc. (2)
AS. of off, from, as in adown (AS. ofd/ne off the dun or hill). (3) AS.
a- (Goth. us-, ur-, Ger. er-), usually giving an intensive force, and
sometimes the sense of away, on, back, as in arise, abide, ago. (4) Old
English y- or i- (corrupted from the AS. inseparable particle ge-,
cognate with OHG. ga-, gi-, Goth. ga-), which, as a prefix, made no
essential addition to the meaning, as in aware. (5) French a (L. ad
to), as in abase, achieve. (6) L. a, ab, abs, from, as in avert. (7)
Greek insep. prefix / without, or privative, not, as in abyss, atheist;
akin to E. un-.
词型变化：名词复数形式 : sas-s
a-的用法和样例：
例句
- Guy was greedy, amoral and dishonest.盖伊贪心、不讲道德、又不诚实。
- Henry used to be totally apolitical,but I think he is now politically more aware.基辛格过去完全不问政治，但是，我认为现在他政治上比较敏锐了。
词汇搭配
- with a pinch of salt有保留地
- stand a chance有希望
- a dose of one's own medicine自己惹来的恶果,自己...
- flog a dead horse徒劳无益
- keep a stiff upper lip坚定不移(顽强不屈...
- once in a blue moon罕见的，极少的，难得...
- show a clean pair of heels逃走(溜之大吉)...
- birds of a feather同类型的人
- with a grain of salt有保留地
- bring to a stand终止
- turn over a new leaf重新开始
- as a matter of fact事实上
- bring to a standstill结束(使终止...
- turn up again like a bad penny不要它偏又回来,挥去...
- at a loose end无事做
- throw a fit大发脾气
- blow a fuse使保险丝熔断(勃然大...
- cut a poor figure出丑
- take something with a grain of salt将信将疑
- on a razor-edge处于危险关头...