Definition of Affect
Quick Meaning of Affect
To change or influence someone or something in some way.
Detailed Definition of Affect
To have an influence on or cause a change in someone or something.
How to Pronounce Affect
Stress pattern: oO (2-syllable word).
Tip: Two syllables, stress on second. Starts with schwa /ə/, then /ɛ/ like in "bet" (not like the noun "effect").
Watch out: Pronounced like "EF-fect" instead of "uh-FEKT"; second syllable gets the stress.
Origin and Etymology of Affect
From Latin "affectare", meaning to work towards or influence.
How to Use Affect in a Sentence
Each example shows “affect” with a CEFR level so learners can pick examples that match their fluency.
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“The bad weather will affect our travel plans tomorrow.”
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“How did the decision affect the team's morale?”
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“Climate change affects ecosystems around the world.”
Synonyms and Antonyms of Affect
Common Synonyms for Affect
Smart Synonyms for Affect — When to Use Each
- influence
- for causing indirect effects or shaping behavior
- impact
- for strong or noticeable effects
Common Collocations with Affect
These phrases pair with “affect” in everyday English:
- affect the outcome
- affect someone's life
- deeply affect
- negatively affect
- affect public opinion
Common Mistakes When Using Affect
Even fluent speakers slip up with “affect”. Here’s how to avoid the most common errors:
- ✗ Wrong: Does the weather affect on our plans?
- ✓ Correct: Does the weather affect our plans?
- Why: The verb "affect" does not take the preposition "on"; use it directly with the object.
- ✗ Wrong: I am affect by the cold.
- ✓ Correct: I am affected by the cold.
- Why: Use the past participle "affected" in passive voice constructions, not the base verb "affect".
Words Confused With Affect
- Affect vs Effect: Affect is a verb meaning to influence; effect is a noun meaning result or consequence. Compare →
Other Forms of Affect
Frequently Asked Questions About Affect
What is the meaning of "Affect"?
To change or influence someone or something in some way.
How do you pronounce "Affect"?
The IPA is /əˈfɛkt/. Two syllables, stress on second. Starts with schwa /ə/, then /ɛ/ like in "bet" (not like the noun "effect").
What part of speech is "Affect"?
"Affect" is a verb at B1 level (Common European Framework).
What are synonyms for "Affect"?
Common synonyms include influence, impact, change.
How do you use "Affect" in a sentence?
For example: "The bad weather will affect our travel plans tomorrow."