aero－：concerningtheairofaircraft

plane—aeroplane

space—aerospace

anti－：against；oppositeof

nuclear—antinuclear

matter—antimatter

war—antiwar

auto－：oforbyoneself

biography—autobiography

criticism—autocriticism

be－：totreatasthestatedthing

friend—befriend

little—belittle

bi－：two；twice；double

lingual—bilingual

cycle—bicycle

bio－：concerninglivingthings

chemistry—biochemistry

sphere—biosphere

by－，bye－：lessimportant

produce—by－produce

way—byway

centi－：hundredthpart

grade—centigrade

meter—centimeter

co－：together，with

author—coauthor

exist—coexist

col－：together，with

location—collocation

com－：together，with

passion—compassion

con－：together，with

centric—concentric

federation—confederation

contra－：opposite

diction—contradiction

natural—contranatural

cor－：together，with

relate—correlate

respond—correspond

counter－：opposite

act—counteract

attack—counterattack

cross－：across；goingbetweenthestatedthingsandjoiningthem

country—crosscountry

breed—crossbreed

de－：showinganopposite；toremove；toreduce

code—decode

value—devalue

dis－：not；theoppositeof

advantage—disadvantage

agree—disagree

honest—dishonest

em－：tocausetobecome

body—embody

power—empower

en－：tocausetobecome；tomake

danger—endanger

large—enlarge

ex－：former

minister—ex－minister

wife—ex－wife

extra－：outside；beyond

curricular—extracurricular

ordinary—extraordinary

fore－：inadvance，before；inoratthefront

arm—forearm

warn—forewarn

il－：not

legal—illegal

literate—illiterate

im－：not

moral—immoral

possible—impossible

in－：not

direct—indirect

sensitive—insensitive

infra－：belowinarange；beyond

red—infrared

structure——infrastructure

inter－：between；among

change——interchange

national——international

intra－：inside，within；into

city——intracity

department——intra－department

ir－：not

regular——irregular

responsible——irresponsible