-ics = 某种学问，关于，有关
aerobics
aesthetics
athletics
ceramics
ethics
civics
demographics
diagnostics
dynamics
electronics
economics
genetics
gymnastics
linguistics
logistics
logics
mathmatics
metaphysics
optics
physics
poetics
robotics
semantics
statistics
politics
-ian = 人或．．．的
politician
agrarian
albanian
algerian
amphibian
arabian
armenian
asian
australian
austrian
authoritarian
avian
av = bird
barbarian
belgian
bohemian
bosnian
brazilian
carlifornian
cambodian
canadian
caucasian
christian
civilian
clinician
colombian
comedian
comedy
croation
custodian
darwinian
dietitian
iranian
italian
jordanian
lesbian
libertarian
librarian
lithuanian
magician
malaysian
mammalian
martian
mathematician
median
musician
newtonian
musician
nigerian
norwegian
serbian
egalitarian
egyptian
electrician
equestrian
ethiopian
freudian
georgian
guardian
haitian
hawaiian
historian
humanitarian
hungarian
indian
indonesian
obstetrician
persian
peruvian
physician
politician
prussian
riparian
romanian
russian
scandinavian
sectarian
vegetarian
venetian
veterinarian
victorian
utopian
utilitarian
totalitarian
theologian
technician
syrian
statistician
sicilian
siberian
-itude = 度，状态
attitude
attitudinal
apititude
altitude
amplitude
gratitude
longitude
longitudinal
latitude
magnitude
servitude
solitude
interpret
interpreter
vt&vi.
interpretation
n.
interpretive
idea
ideal
adj. idea + al
- the ideal candidate
ideally
adv.
- an ideally suited couple.
idealism
n.
idealist
n.
- hopelessly idealist
idealistic
adj.
idealize
vt.
idealized
adj.
idol
n.
idolize
vt.
- idolize their kids.
- a pop star idolized by millions of fans.
isol- = isle
isolate
vt.
isolated
adj.
isolation
n.
isolationist
n.adj.
im- = to copy; imit- = to copy, portray
image
n.
imaging
n.
imagery
n.
imagine
vt.
imagine
vt.
imagined
adj.
imaginable
adj.
unimaginable
adj.
imaginary
adj.
imagination
n.
imaginative
adj.
imitate
vt. im- + -itate
imitation
n.adj.
emulate
vt. em- = im + ul + ate
infra-, infer- = under, among
underage
adj.
underbrush
n.
undergrowth
underclass
n.
underdeveloped
adj.
underdog
n.
top dog
underestimate
vt.
overestimate
vt.
underfoot
undergo
vt. under + go
underlie
vt.
underlying
adj.
undermine
vt.
underneath
prep.adv.n
underpants
n.
underpin
vt.
underpinning
vt.
undersea
adj.
undersecretary
n.
underside
n.
undertake
vt.
undertaking
n.
undertone
n.
overtone
n.
undercurrent
n.
underway
adj.
underwear
n.
underworld
n.
underwrite
vt.
underwriter
n.
underwriting
n.
infrared
adj. infra- = under + red
inferno
n.
exteriro
n. ex- = outside + t + -erior
external
adj.
internal
adj.
externalize
vt.
externality
n.
exotic
adj.
exodus
n. ex- = out + od- = way,road + -us
exonerate
vt. ex- = out + -oner=onus=burden + ate
onerous
adj. oner- = burden + -ous
exit
exile
n.vt.
intern
n.vt.
internship
n.
internal
adj.
internalize
vt.
internist
n.
internment
n.
interagency
adj.
Inter-American
adj.
interchange
n.vt.
interchangeable
adj.
intercom
n.
interconnection
n.
interfaith
adj.
intergovernmental
adj.
interim
adj.
interlocking
adj.
interlocutor
n. inter- = between + -locut- = -logu
international
adj.n
internationally
adv.
internet
n.
interpersonal
adj.
interracial
adj.
interrelated
adj.
interrelationship
intersperse
vt. inter + -spers= to scatter
intertwine
vi.vt.
interval
n. inter- = between + -val = wall
interweave
vt. inter- + weave