Answers

2014-06-19T17:21:30+08:00
Prefixes are added at the beginning of the word to change its meaning like:
independent
Encircle
expand
hypothesis
interact
non-alcoholic
outstanding
preposition
postpone
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2014-06-19T17:24:01+08:00
A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word
prefix                     meaning                 
example:
 a                             not          asymmetric, "not symmetric" 
allo                         other       allotransplantation, "transplant of tissue from another person"
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