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Word

affect

verb B2
/əˈfɛkt/

Meanings

verb

To influence or change something in some way.

affect: To influence or change something in some way.
verb

To cause someone to feel a particular emotion or to have an emotional impact on someone.

affect: To cause someone to feel a particular emotion or to have an emotional impact on someone.
noun

In psychology, an observable display of emotion shown in facial expression or tone.

affect: In psychology, an observable display of emotion shown in facial expression or tone.

Definition

To affect something is to influence it or cause it to change.

To affect means to influence what happens to someone or something. It often describes how a situation, action, or event changes results, feelings, health, or decisions. In psychology, it can also mean an emotional state shown on someone’s face or in their voice.

Examples

  • Heavy rain can affect the commute.
  • The new rule will affect small businesses the most.
  • Her comments didn’t affect my decision.
  • Lack of sleep can affect your mood.
  • The movie’s ending really affect me.

Common mistake

Learners often confuse affect (usually a verb) with effect (usually a noun).