The document discusses prefixes, which are added to the beginning of base words to change their meaning. It provides examples of prefixes like co-, ex-, re-, inter-, bi-, counter-, pre-, semi-, post-, mono-, anti-, and non- and the meanings they convey. Some prefixes and the words they form are co-worker, ex-husband, re-paint, international, bicycle, counterattack, pre-school, semi-circle, postgraduate, monorail, anti-social, and non-stop. The document also contains exercises asking the reader to identify prefix meanings and form new words using prefixes.

2. Prefixes are added to the beginning of a base word.
They change the meaning of the base word.
I. Co (with, together)
=>Co-pilot means “Assistant or second pilot”
=>Co-worker means fellow worker, colleague
=>Co-operate means that work together.
Example: She got the goods on her co-worker after
reading his e-mail.

3. Ex-(former, before)
=>Ex-husband means former husband
=>Ex-serviceman means that one
=>Ex-boyfriend mean that A man who
is no longer a woman's boyfriend
Examples: her ex-boyfriend stalked her

4. Re-(again)
=>Re-paint means paint again, recoat with paint, cover
with a new layer of paint
=>Remarry means marry again, wed another time
=>Restudy means learn again; study again
Examples: If you fail these exam, you will restudy this
course the same.

5. Inter- ( between)
=>International means between countries,
involving or belonging to two or more countries,
of relations between two more countries.
=>Inter-city means that between cities.
Travelling between cities.
Ex: an international team of doctors urge
some patients to hospital every day, in order to
cure their TB

6. Bi -(two)
Bicycle means two-wheeled vehicle
operated by pedaling.
Bimonthly means that event which
occurs every two months
Ex: The magazine is published
bimonthly, with six issues a year.

7. Counter​​​​​​​​​ -(in the opposite direction)
 Counterespionage means that espionage
intended to detect and prevent enemy espionage,
secret action taken by a country to prevent another
country from discovering its military, industrial or
political secrets
 Counterattacked means that retaliate, make a
counterattack, fight back (=an attack on someone
who has attacked you)
 Ex: The Republicans have launched a strong
counterattack against the Democrats' manifesto.

8. Pre -(before)
 Pre-school means that prior to school-age, an educational institution
for children too young for elementary school.
 Pre-conscious means that fore conscious, part of the mind which
exists on a deeper level than the immediate memory or conscious
(Psychoanalysis)
 Pre-war means that prior to a war, existing or occurring before
wartime
Example: Prewar in Cambodia is fulfil development

9. Semi-(half)
• Semicircle means that half of a circle
• Semidetached means that house divided
into two in order to inhabit two families
• Example: They live in a semi-detached-
house.

10. Post-(after)
Postgraduate means that Of or relating to
studies beyond a bachelor's degree, A student
who continues studies after graduation
(=postgrad)
 Post-war means that Belonging to the period
after a war.
Example: Post-war in Cambodia for every
infrastructure was almost broken and
damaged.

11. mono -(one)
 Mono-syllable means that a word of one syllable,
A word or utterance of one syllable
 Monorail means that A railway having a single
track.
 Monologue means that Speech you make to
yourself, A (usually long) dramatic speech by a
single actor (=a long speech by one person).
 Example: He subjected me to a monologue on
his last stay in hospital.

12. Anti-(against)
Anti-social means that harmful to society
Example: Increasingly, smoking is
regarded as an anti-social habit.

13. non-(not)
Non-stop means that without stops; all the
time, without a rest or break
Example: My teacher has always counselled
non-violence.

14. Prefixes
Add a prefix to the beginning of each word to make a new
word. Draw a line form the word to its meaning.
 ____education
 ____war
 ____war
 ____lingual
 ____detached
 house divided into two in order to inhabit
two families
 Using or knowing only one language
 Belonging to the period after a war
 joint education, education of both sexes at
the same institution.
 occurring before wartime

15. Prefixes
 The prefix re means again.
 Reread means to read again.
 Rewrite means to write
again.
 What does retry mean?

16.  Anti + aircraft = antiaircraft
Non + smoker = non-smoker

17.  The prefix mono means
in one.
 Mono-rail means in a
railway having a single
track .
 Pre-school means in a
prior to school-age.
 What does Counterattacked
mean?
 The prefix Inter
means between.
 Co means with,
together.
 Ex means before,
former.
 What does Co-
operate mean?

18. Prefixes
 ____do
 ____ bellum
 ____ member
 ____ city
 ____exist
 The time live
together peacefully
 after the war
 one who is not a
member
 Travellng between
cities
 Do again

19. Match each word with its definition.
reheat • having two sides; reciprocal
• speaking only one language
• to heat a second time, rewarm
• one who has served in the armed forcesBilateral
Ex-serviceman
Monolingual
counter-argument
•an argument against another argument, idea or
suggestion