Language Arts Grade Six
Unit Sixteen, Lesson Three: Prefixes: Un- and Re-
- wind
- mind
- find
- spine
- fine
- mine
- fossil
- fuel
- electric
- thermal
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- turbines
- dam
- project
- generate
- hydroelectric
- geothermal
- gasoline
- coal
- efficient
- plentiful
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Prefixes: Un-
The prefix un- means not or the reverse of. Here are some words which begin
with the un- prefix.
unclean unhappy unfair
unbeatable uncertain uncommon
unusual unleaded untie
unable unexpected unwilling
The meaning of these words is very clear and obvious. For instance, you may
have noticed that gasoline is usually labeled "unleaded" and you may realize
that gasoline used to contain lead and that most gasoline sold today does
not contain lead (which is why it's called unleaded).
unclean = not clean
unhappy = unhappy
unfair = not fair
untie = the reverse of tying
uncertain = not certain
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