单词前缀prefix决定单词的情感(emotion )和方向(orientation )
一、向上
1、up-
uphold, upsurge, uproar
2、sus-,sup-,suf
sustain
superior ⇔inferior, superiority ⇔inferiority
sufficient, sufficiency, suffice sb. in funds
⇔deficien匮乏的，insufficient 不足的
3、over
①上，重叠overlap
②过(Bite off more than one can chew.)
over-sensitive
over-insistance偏执(Only Paranoia Survive)
overwhelm淹没，an overwhelming number of
4 hyper
hypersensitive skin,指人同oversensitive
hypercritical吹毛求疵的，过分苛刻
二 、向下
1 hypo,hyp
hypocritical虚伪的, hypocricy,hypocrite伪君子
hypothesis假设，前提(prerequisite)
Under the hypothesis of…
hypothetical,hypothetically
hyponosis催眠 hypnotic
2 mal
malice恶意be malicious to=be hostile to(hostility敌意⇔hospitality殷勤好客)(hospitalize 使某人住院be hospitallized by overloading of job)
maltreat虐待
3 mis
mistreat=maltreat
mislead ,be misled by
misunderstanding
misjudgement(judgment,e可省略，元音可被取消，元音作用是使发音饱满)
4 a
theism⇔athesim无神论，symmetry⇔asymmetry不相称
5 un，under
scrupulous认真的，勤勤恳恳的⇔unscrupulous马虎的，死不要脸的，寡廉鲜耻的
unconcious无意识的 subconscious潜意识的
unfeasible 不可行的
undergo经历(偏艰难场合)undergo the tough period
undertake艰难地承担innovative undertaking(set/build up one's busniness)
6 in
①在…的里面(当后面跟着的部分并非是独立单词时)
inanity空虚(vanity 虚荣，vacant没有被占用的，vacancy)
②向下(当后面跟的是独立单词时)
invalid,invalidity
inconvenient
7 ill, im, imm, irr
immune , be immune to
immunity,immunology,immunologist
immortal永垂不朽的 immotality
impartial 不偏不倚的，公正的
impart 传授apprentice 徒弟
impact
inpair 损害，减弱，削弱
imprudent马虎的
impudent无礼的
immobile 不动的
illegal(performance/conduct)
illegitimate(qualification,based on lineage,kinship)
irreplaceable不可取代的，irreplaceably,不可取代地
8 dis
①=away分开
dispense分配，拨款
be dispensed from punishment免于，免除
(keep…from,prevent…from,protect…from)
indispensible=necessary,必不可少的，indispensibly
distribute分配，分销
②=no否定
dissatisfaction
discontent
dispute争吵 be in dispute
disputable有争议的，可争议的Hypothetically,we may firmly arrive at an indisputable conclusion that…
9 ab=off剥离，抽离，分开
abolish丢弃，废弃abolish law/regulations/conventions
abate=not eat减弱，废掉
abstract a.抽象的 v.使抽象，使抽象化 n.摘要
abound vi使…无边无界，充满，到处存在
Examples of this win-win topic abound in recent business world.
10 di,de,dis: away↓
deforest乱砍滥伐(mudslide泥石流，landslide土地流失)
dilemma , I am in a dilemma about whether to study abroad or to pursue knowledge in domestic atmosphere.
11 of ↓=op,ob 对抗
offend冒犯⇔defend
offensive进攻性的 offensive weaponry
offense n.进攻，冒犯⇔denfense
offset v./n.抵消 rise up the price to offset the increasing costs
(区别set off=set/be about doing开始做；set out to do=take off=initiate启动；outset开始，开端beginning⇔outcome结果，结局result)
oppose反对，opponent
oppress,oppressed a./n.被压迫者⇔ruler
ob ↓对面，对立
obstacle
oblige①迫使，压迫，强迫，oblige sb. to do
obligation=liability(更加接近于responsibility)
②(深深)感激I am much obliged to you for your kindness in giving me the first aid after that unfortunate CRH crash.
obsess, be obsessed with 被…所困扰/着迷/吸引
observe 观察(第一步) perceive 领悟(第二步)
12 anti
anti-human offense
anti-cancer, anti-body
anticipate 期望=expect(cipate=take,participate in,emancipate解放，释放=spare)
13 counter
① 对抗，假
counterpart
counterbalance对抗之下的平衡
counterfeit currency 伪造的
②反
clockwise⇔counterclockwise
