What is the difference between the words affect and effect?
Both affect and effect can be used as a verb or noun.
Affect - noun
In this case, affect refers to how someone appears to be feeling. For example:
The bored boy had a very flat affect.
Affect - verb
There are really two meanings of affect as a verb. The most common is to influence or have an impact on something:
Staying up all night will affect your performance on the test.
The other meaning of the verb affect is to pretend something:
The actor will have to affect a Southern accent.
Effect - noun
An effect is a result of some cause. For example,
The effect of your meanness was that Susie cried.
Effect - verb
When used as a verb, effect means to make something happen:
The computer committee will effect the switch from PCs to Macs.
The most common uses of these two words are as follows:
'Affect' (verb) means 'influence' and 'effect' (noun) means 'result' or 'consequence.'
example: How does secondary smoking affect non-smokers' health? One effect, especially in young children, is a sharp increase in chronic infections and pulmonary disorders.