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2.2 Prefix ท่ีเตมิ หนา คาํ แลว ทําใหค ํานั้นมีความหมายแตกตางออกไปในแตล ะคําตาม
ความหมายของ prefix น้นั ๆ เชน
Prefix Meaning Example

re- again rewrite, revisit, rearrange, reform, repeat
re-, retro- back return, replace, replay, repay
inter- between, among, together interact, interchange, international, interview

ex- former, previous ex-king, ex-teacher, ex-wife, ex-war
anti-, contra- against antifreeze, anti – bacterial, antisocial
pro- in favor of pro – British, pro – German, pro – hand

2.3 Prefix ทเี่ ติมแลว บอกความหมายปริมาณ (quantity) และขนาด (size) เชน
Prefix Meaning Example Meaning

mono- one monorail a railway with a single rail

bi- two, twice, both bicycle two – wheeled machine for riding
bicentennial on happening once in 200 years
semi- half or part semicircle half a circle

multi- many multiform having several different shapes

Activity 3 Prefix : Try to figure out the meanings of the bold typed words in the
following sentences.

กจิ กรรมท่ี 3 จงหาความหมายของคําท่พี มิ พต ัวหนาของประโยคตอ ไปนี้
1. Could you repeat what you said? I think I misunderstand ………………………..
2. My family disapproves of my smoking …………………………………………...
3. Just reading English in an ineffective way to learn the language. You need to practice
speaking and listening also. ………………………………………………
4. The Health Department warned us of the impurity of the water in the lake. ………
5. You should not lend your camera to that irresponsible young man. ……………….
6. I don’t like to read his handwriting because it is illegible. …………………………