1.able 系列
*able 
ability
*-ity：
disabled
*dis-:
enable
*en-:
enable sb. to do sth.
comparable
innumerable
practicable
profitable
难词死记：
vulnerable
2. en- 系列
  enlarge 
  endanger 
  enrich
enhance
engagement
额外收获：
fatal 
ally，alliance 
rally 
猜一猜：
enlighten 
allow 
allowance
make allowance for
You should make allowance for his youth. = You should allow for his youth.
alone 
lonely 
along
alongside
3.long- 系列
long
longitude
latitude
length
belong
prolong
4.pro- , pre- 系列
profound 
promise
project
promote
propaganda
proximity
prepare
prevent
pregnant
prewar
preschooler
1.ACT- 系列
Act-，ag-
act
action
Actions speak louder than words.
active
activity
react
interact
2.Trans- 系列
Trans-:
transact
transaction
translate
transplant
transparent
transport
3.Tra- 系列（trans- 系列变形）
trash 
track
trade
travel
tragedy
tragic
4.Port 系列
Port
Airport
port-:
porter
Harry Potte
pot
hot-pot
passport
import
export
report
support
sub-：
I support you.
I back you up.
I got your back.
Backup
【辨析】
Opportunity
Chance
Let chance decide.
Let it be.
Let me go.
Let go of me.
5.易混词汇辨析系列（1）
Chance
Cancel
Cancer
Constellation
6.Astr- 系列
Disaster
Disastrous     
Catastrophe
【辨析】
Astrology
Astronomy
anonymous
7.log- 系列
dialogue
logical
biological
apologize
psychological
physiological
philosophy
technology
ecology
ideology
sociology
slogan
eloquent
8.port- 系列（2）
portion
【辨析】
apportion
allocate
distribute
proportion
proportionate
disproportionate
portrait
portray
【辨析】
Profile
Picture
Sketch
9.apt- & opt- 系列
adapt
adopt
adept
apt-
opt-
option
optional
optimist
optimistic
10.ag- 系列
ag-:
agenda
agent
detective
agency
travel agency
agile
-ile：
agitate
agony
11.由add到a**
*Add
Addition
Additional
*abb-, acc-, add-, aff-, agg-. …
*a**-:
accident
afford
arrest
assign
assist
access
assess
12.Cess- 系列
excess
excessive
process
procedure
concession
recession
successor
predecessor
13.Gress- 系列
progress
congress
congressional
aggressive
regret
14.It- 系列
Visit
Initiate      
【辨析】
initial
initiative
transit
Transition
15.van 系列
Advance
in advance
advanced
advantage
take advantage of
to advantage
举一反三：
disadvantage
16.Pear-，pare- 系列
pear
pearl
*pear-，pare-:
appear
appearance
disappear
apparent
apparently
17.–ent 系列
ancient
confident
current
frequent
Present
Urgent
22. agri- 系列
*agri-:
acre
agriculture
*cult-:
culture
cultural
cultivate
If you wish to survive you need to cultivate a strong mental attitude.
cultivation
23.其他土
earth
dirt
dirty
concrete
domain
*camp
campaign
campus
champion
24. air
AQI  API
airline
airspace
airway
aircraft
Craft     
craftsman
25. 易混词辨析系列（2）
*craft
handicraft
crash
scratch
catch
scrap
26. off系列
see off
take off
call off
put off
fall off
show off
offspring
offset
offence
offensive
defense
defensive
27. proof 系列
airproof
*proof
waterproof
fireproof
lightproof
soundproof
woman proof
proof
prove
bulletproof
28. prove- 系列
*improve
approve
【近义】
affirm
authorize
sanction
approve
approval
*n.+al=adj.
v.+al=n.
arrive
arrival
survive
survival
29. viv- 系列
*viv-:
live
alive
lively
vivid
revive
evil
veil
30. 变体：vit- 活
vitamin
vital
vitalize
dynamic
vigorous
vigor
31. “重要的”系列
fundamental
crucial
vital
essential
principal
principle
32. 以熟记新 系列（1）
answer
swear
swear by
swear in
swear off
33. 拓展词汇的方法
apply
appliance
applicable
applicant
application
长得像，不能忘：
appeal
appeal to
34. art 系列
art- :
artist
article
-icle:
particle
vehicle
articulate
artless
natural
nature
human nature
artifact
artificial
man-made
beneficial
superficial
*Beauty is only skin deep.
*Beauty is in the eye of the beholder.
35. –less 系列
countless
endless
limitless
tireless
doubtless
reckless
nonetheless
36. bar- 系列
*bar
barrier
barricade
embarrass
barren
bare
barely
bear
forebear
37. “少”系列
barely
rarely
hardly
scarcely
38. “减少”系列
decrease
lessen
reduce
impair
minus
diminish
39. min- 系列
mini
minute
minimum
maximum
minority
majority
minister
majesty
administer
administration
40. fore- 系列
*fore-
foresee
foretell
foremost
forehead
forecast
forward
active词根词缀
forth
forthcoming
41. fort--系列
*fort
fortune
misfortune
fortunately
42. dict—系列
foretell
predict
*dict-:
dictionary
diction
dictate
indict
indicate
43. contra- 系列
contradict
*contra-:
contrary
on the contrary
contrast
in contrast
44. doc- 系列
doctor
*doc-:
docile
doctrine
45. duc- 系列
*duc-, duct-:
introduce
produce
induce
reduce
reproduce
educate
education
46. duc—系列（2）
Conduct     
product
byproduct
【辨析】
product
productive