Affirm vs Confirm

When to use each in English, with meaning, register, and examples.

 AffirmConfirm
MeaningTo say that something is true or to support it.To say that something is true or to make sure of it.
CEFR levelB1B1
Part of speechverbverb
Usage notesUse 'affirm' in contexts that require a supportive or confirming statement. It's appropriate in formal discussions, but less so in casual conversations, where simpler words like 'say' or 'agree' might work better.Use 'confirm' in both formal and informal contexts, such as meetings or casual conversations. It's appropriate when verifying information or giving approval.

Frequently asked questions: Affirm vs Confirm

What's the difference between "Affirm" and "Confirm"?

"Affirm" means: To say that something is true or to support it. "Confirm" means: To say that something is true or to make sure of it.

When should I use "Affirm" and "Confirm"?

They can all be used in everyday English.

Are "Affirm" and "Confirm" the same CEFR level?

"Affirm" is at B1, "Confirm" is at B1 on the CEFR scale.