aero-：concerning the air of aircraft

　　plane—aeroplane

　　space—aerospace

　　anti-：against；opposite of

　　nuclear—antinuclear

　　matter—antimatter

　　war—antiwar

　　auto-：of or by oneself

　　biography—autobiography

　　criticism—autocriticism

　　be-：to treat as the stated thing

　　friend—befriend

　　little—belittle

　　bi-：two；twice；double

　　lingual—bilingual

　　cycle—bicycle

　　bio-：concerning living things

　　chemistry—biochemistry

　　sphere—biosphere

　　by-，bye-：less important

　　produce—by-produce

　　way—byway

　　centi-：hundredth part

　　grade—centigrade

　　meter—centimeter

　　co-：together，with

　　author—coauthor

　　exist—coexist

　　col-：(used before l ) together，with

　　location—collocation

　　com-：(used before b，m，p ) together，with

　　passion—compassion

　　con-：together，with

　　centric—concentric

　　federation—confederation

　　contra-：opposite

　　diction—contradiction

　　natural—contranatural

　　cor-：(used before r ) together，with

　　relate—correlate

　　respond—correspond

　　counter-：opposite

　　act—counteract

　　attack—counterattack

　　cross-：across；going between the stated things and joining them

　　country—crosscountry

　　breed—crossbreed

　　de-：showing an opposite；to remove；to reduce

　　code—decode

　　value—devalue

　　dis-：not；the opposite of

　　advantage—disadvantage

　　agree—disagree

　　honest—dishonest

　　em-：( used before b，m，p ) to cause to become

　　body—embody

　　power—empower

　　en-：to cause to become；to make

　　danger—endanger

　　large—enlarge

　　ex-：former ( and still living )

　　minister—ex-minister

　　wife—ex-wife

　　extra-：outside；beyond

　　curricular—extracurricular

　　ordinary—extraordinary

　　fore-：in advance，before；in or at the front

　　arm—forearm

　　warn—forewarn

　　il-：( used before l ) not

　　legal—illegal

　　literate—illiterate

　　im-：( used before b，m，p ) not

　　moral—immoral

　　possible—impossible

　　in-：not

　　direct—indirect

　　sensitive—insensitive

　　infra-：below in a range；beyond

　　red—infrared

　　structure——infrastructure

　　inter-：between；among

　　change——interchange

　　national——international

　　intra-：inside，within；into

　　city——intracity

　　department——intra-department

　　ir-：(used before r)not

　　regular——irregular

　　responsible——irresponsible

　　kilo-：thousand

　　gram——kilogram

　　meter——kilometer

　　macro-：large，esp.concerning a whole system rather than particular parts of

　　economics——macroeconomics

　　structure——macrostructure

　　mal-：bad or badly

　　function——malfunction

　　treat——maltreat

　　micro-：extremely small

　　computer——microcomputer

　　electronics——microelectronics

　　mid-：middle

　　day——midday

　　night——midnight

　　mini-：small；short

　　bus——minibus

　　skirt——miniskirt

　　mis-：bad or badly；wrong or wrongly

　　fortune——misfortune

　　understand——misunderstand

　　mono-：one；single

　　plane——monoplane

　　tone——monotone

　　multi-：more than one；many

　　purpose——multipurpose

　　national——multinational

　　non-：not

　　resident——non(-)resident

　　sense——nonsense

　　out-：outside；beyond

　　live——outlive

　　door——outdoor

　　over-：too much；above；additional

　　head——overhead

　　time——overtime

　　poly-：many

　　centric——polycentric

　　syllabic——polysyllabic

　　post-：later than；after

　　graduate——postgraduate

　　war——postwar

　　pre-：before；in advance

　　pay——prepay

　　war——prewar

　　pro-：in favor of，supporting

　　America——pro-America

　　abortion——pro-abortion

　　re-：again；back to the former state

　　unite——reunite

　　use——reuse

　　self-：by means of oneself or itself；of，to，with，for，or in

　　oneself or itself

　　employed——self-employed

　　taught——self-taught

　　semi-：half；partly

　　circle——semicircle

　　final——semifinal

　　step-：not by birth but through a parent who has remarried

　　mother——stepmother

　　children——stepchildren

　　sub-：under，below；less important；part of the stated bigger whole

　　divide——subdivide

　　section——subsection

　　super-：more，larger，greater than usual

　　market——supermarket

　　natural——supernatural

　　tele-：at or over a long distance；by or for television

　　communication——telecommunication

　　screen——telescreen

　　therm(o)-：concerning heat

　　chemistry——thermochemistry

　　meter——thermometer

　　trans-: across，on or to the other side of ; between

　　Atlantic—transatlantic

　　plant—transplant

　　tri-: three; three times

　　angular—triangular

　　cycle—tricycle

　　ultra-: beyond; very，extremely

　　modern—ultramodern

　　sound—ultrasound

　　un-: not

　　certain—uncertain

　　fortunate—unfortunate

　　under-: too little; below

　　develop—underdevelop

　　sea—undersea

　　uni-: one，singer

　　form—uniform

　　directional—unidirectional

　　vice-: next in the rank; below

　　chairman—vice-chairman

　　president—vice-president