Vocab5000
Dictionary CEFR Levels IELTS & TOEFL Expressions Confusing Words Games Download App

Affect vs Effect: What's the Difference?

B1 Similar Spelling

What's the Difference?

Affect is typically used as a verb meaning 'to influence,' while effect is used as a noun meaning 'impact' or 'result.

Memory Tip: affect = action, effect = end result

affect stress on second syllable, effect stress on first

affect /əˈfɛkt/

verb
To affect something means to change it or make it different.
Example:
If you don't wear a coat, the cold might affect your health.
Common patterns:
affect someone’s feelings affect the environment
affect →

effect /ɪˈfɛkt/

noun
A change that happens because of something else.
Example:
The new law will have a positive effect on the environment if everyone follows it.
Common patterns:
cause and effect positive effect
effect →

Common Mistakes

The new law will effect the economy significantly.
The new law will affect the economy significantly.
Affect is correct here because it is used as a verb to describe the action of influencing the economy.
The affect of the new policy was immediately noticeable.
The effect of the new policy was immediately noticeable.
Effect is correct here because it is used as a noun to describe the result of the new policy.

Quick Practice

0/2 correct
1. If you don't wear a coat, the cold might ____ your health.
2. The new law will have a positive ____ on the environment if everyone follows it.

Never confuse affect / effect again

Practice confusing word pairs with your daily goal in the Vocab5000 app and learn them for good with a scientifically proven repetition system. Start for free now.

Vocab5000