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FAQ

Adj.Prefix Meaning Example

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Il- opposite/not illegal/illegible

Im- opposite/not impossible/immodest

In- opposite/not incorrect/insensitive

Inter- between international

Ir- opposite/not irrelevant/irresponsible

Non- not non-smoker/non-alcoholic

Over- too much overweight

Un- opposite unfair/unkind

Under- too little underweight

 

Negative prefixes

un- unmagnetized

in- incomplete

im- impossible

il- illegal

ir - irregular, irrelevant

non- not connected with non-programmable

mis- misdirect

mal- bad, wrong malfunction

dis- opposite feeling disagree

opposite action disconnect

anti- against antiglare

de- reduce, reverse demagnetize, decode

under- too little underestimate

 

 Positive prefixes re- do again reorganize over- too much overloaded     Prefixes of location: inter- between, among interface, interactive super- over supersonic trans- across transmit, transfer ex- out exclude, extrinsic extra- beyond extraordinary sub- under subschema infra- below infra-red peri- around peripheral inter = inside (intercontinental)   Prefixes of time and order: ante- antecedent pre before prefix prime- first primary, primitive post- after postdated retro- backward retroactive    
Prefixes of size: semi- half, partly semisphere equi- equal equidistant mini- small minicomputer micro- very small microcomputer macro- macroeconomics megalarge, great megabyte pre = before (pre arrangement) pro = in favour (pro-life) pro- before, in advance program,   Other Prefixes: auto- self automatic co- co-ordinate con- together, with connect     Prefixes of numbers: semi- half semicircle mono- one monochromatic bi- two binary tri- three triangle quad- four quadruple penta- five pentagon hex- six hexadecimal sept(em)- seven September oct- eight octal dec- ten decimal multi- many multiplexor  

 

 

Exercise 1. Read the following sentences and circle the prefixes. For each word that has a prefix, try to decide what the prefix means. Refer back to the table if you need help.

1. Floppy disks are inexpensive and reusable. 2. If a printer malfunctions, you should check the interface cable. 3. The multiplexor was not working because someone had disconnected it by mistake. 4. Improper installation of the antiglare shield will make it impossible to read what is on the screen. 5. After you transfer text using the 'cut and paste' feature, you may have to reformat the text you have inserted. 6. You can maximize your chances of finding a job if you are bilingual or even trilingual. 7. Peripheral devices can be either input devices (such as keyboards) or output devices (such as printers). 8. Your pay rise is retroactive to the beginning of June and you will receive a biannual bonus. 9. The octal and hexadecimal systems are number systems used as a form of shorthand in reading groups of four binary digits. 10. As the results are irregular, the program will have to be rewritten.

Exercise 2. Fill in the gaps with the correct prefix from the following list

auto de dec inter maxi mega micro mini mono multi semi sub

1. Most people prefer a colour screen to a ______ chrome screen. 2. _____script is a character or symbol written below and to the right of a number or letter, often used in science. 3. A ____byte equals approximately one million bytes. 4. Once you finish your program, you will have to test it and ______bug it to remove all 114 the mistakes. 5. The introduction of _____conductor technology revolutionized the computer industry. 6. If a computer system has two or more central processors which are under common control, it is called a ________processor system. 7. The _____imal system is a number system with a base of 10. 8. When the user and the computer are in active communication on a graphics system, we refer to this as ______active graphics.

 

 

Exercise 3. Complete the sentences with the word given and one of the prefixes listed above.

1 This meat is...............................and its still raw. I dont like it. (cook)

2 This morning I.......................and I was late for work (sleep)

3 This composition is badly done. Youll have to................. it. (write)

4 The.....................in the film was Angelina Jolie.(star)

5 They.................................me in that restaurant. It was really very expensive. (charge)

6 After demolishing the old school, they are now.............................a new one. (build)

7 What do you.................................for my future? (see)

8 The room was........................................It was very hot indeed. (heated)

9 I saw a film about a famous Western........................... (law)

10 That supermarket is.............................its products. Lets go shopping there. (sell)

11 During the war they built............................shelters. (ground)

12 Dont.....................................Take it easy. (do)

13 They have.........................the cinema they had closed down. (open).

 

 

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