A prefix is placed at the beginning of a word to change its meaning. For example, the suffix re- means either again or back as in return, repeat or refurbish.

The following 4 prefixes are easy to confuse because they all have a negative meaning.


The prefix un means not, reverse action, deprive of, release from. For example, unable or unfair.


The prefix mis means wrong. For example, mistake or misunderstand.


The prefix dis also means not and opposite of. For example, disconnect.


The prefix im can also mean not and opposite of. For example, impossible

prefixes re – means ‘again’, e.g., reappear

anti – means ‘against’, e.g., antisocial

auto – means ‘self’, e.g., autobiography

Add ‘re’, ‘anti’, and ‘auto’ to the following words.

RE adjust

ANTI climax

ANTI social

ANTI septic

AUTO matic

RE build

RE live

RE call

AUTO mation

ANTI ageing

If you are not sure of the meanings of any of these words look them up in a dictionary.

Task: Write ten sentences. Each sentence must include one of the prefixed words from above.  Can you spot any prefixed words? Write down a list of the prefixed words you find from a story that you are reading.


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