affect

word

/əˈfɛkt/
uh-FEKT
/əˈfɛkt/
uh-FEKT

Definition

To affect something means to cause a change in it or influence what happens to it. It is often used for things like decisions, feelings, health, results, or situations.

Usage & Nuances

Most commonly a verb: 'affect the outcome', 'affect your health'. Learners often confuse it with 'effect'; usually 'affect' is the verb and 'effect' is the noun. It is common in neutral, formal, and everyday English.

Example Sentences

Lack of sleep can affect your mood.

basic

Rain will affect the game today.

basic

This medicine may affect your stomach.

basic

I didn't realize my words would affect her so much.

natural

The new policy could affect how we work every day.

natural

Try not to let one bad comment affect your confidence.

natural