Prefixes and Suffixes

There are many prefixes and suffixes in English. What I posted here is just a few of them. You might need to consult your dictionary to know other kinds of prefixes and suffixes.

If you put a certain prefix to a root word, it will change the meaning of the word. For example, if you put the prefix in- before the root word ‘active’, it means not active.

To change the function of the root word, just add a suffix at the end of the word. For example, if you place the suffix -er at the end of the verb ‘compute’, so now it becomes ‘computer’ and functions as a noun.

 

The following prefixes mean ‘not’the opposite of the root word:

un- : unnatural

dis- : disagree

im- : immoral

in- : inactive

il- : illegal

ir- : irregular

non- : non-living

 

The prefix re- means ‘again’

redo

replay

rewind

rewrite

 

The prefix bi- means ‘having two’

bicycle (having two wheels)

bilingual (having two languages)

 

The prefix di- means ‘twice’ or ‘double’

dilemma

dioxide

 

The prefix co- means ‘jointly’ or ‘equally’

co-operate

co-worker

 

The prefix ex- means ‘out’, ‘out of’ or ‘out from’ also ‘former’

extract

expatriate

ex-husband

 

The following suffixes are used to form nouns:

-ness : togetherness

-ance or -ence : disturbance difference

-ment : development

-ion : generation

-er or -or : banker, editor

 

The suffix -ly is used to form adverbs of manner

nicely

friendly

 

The suffix -ous is used to form adjectives

dangerous

hazardous

 

Check out this video from cambridgeenglishtv.

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