What is the usual difference between affect and effect?
Affect is most commonly a verb meaning to influence. Effect is most commonly a noun meaning a result or consequence.
Quick Difference
Affect is most commonly a verb meaning to influence or change something. Effect is most commonly a noun meaning a result or consequence. Less common exceptions exist.
Affect Meaning
to influence or produce a change in something.
Effect Meaning
a change or result caused by an action or event.
Affect vs Effect Comparison Table
FeatureAffectEffect
Meaningto influence or produce a change in somethinga change or result caused by an action or event
Part of speechverbnoun
Strength / nuanceUsually describes the action of influencing or changingUsually names the result or consequence
Typical contextInfluence on demand, behavior, health, prices, or outcomesResults, consequences, impacts, or changes caused by something
ExampleWeather can affect demand.The policy had an immediate effect.
Frequently Asked Questions
Are affect and effect always a verb and a noun?
No. Less common specialized uses exist, so the usual pattern is guidance rather than a rule for every sentence.