Affirm vs Confirm
When to use each in English, with meaning, register, and examples.
Affirm
Top 3,000 (common)B1verb
Confirm
Top 2,000 (common)B1verb
Most common: Confirm
| Affirm | Confirm | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/əˈfɜːm/","/əˈfɜːmz/","/əˈfɜːmd/","/əˈfɜːmɪŋ/"]/🇺🇸 /["/əˈfɜːrm/","/əˈfɜːrmz/","/əˈfɜːrmd/","/əˈfɜːrmɪŋ/"]/ | 🇬🇧 //kənˈfɜːm//🇺🇸 //kənˈfɜrm// |
| Meaning | To say that something is true or to support it. | To say that something is true or to make sure of it. |
| Example | Both sides affirmed their commitment to the ceasefire. | Can you confirm the time for the meeting tomorrow? |
| Register | Neutral | Neutral |
| How common | Top 3,000 (common) | Top 2,000 (common) |
| CEFR level | B1 | B1 |
| Part of speech | verb | verb |
| Collocations | affirm one's beliefs, affirm a statement, affirm support, affirm a decision, affirm the truth | confirm a reservation, confirm an appointment, confirm information, confirm a hypothesis, confirm results |
| Antonyms | deny, reject, dispute | deny, disprove, reject |
| Common mistakes | Confused with 'confirm'—they have similar meanings but different usages., Using 'affirm' without an object (e.g., saying 'I affirm' instead of 'I affirm my support')., Incorrectly using 'affirm' in negative contexts. | Confused with 'affirm' which is more formal., Using 'confirm' without an object in sentences., Incorrectly assuming 'confirmed' is always followed by a date. |
| Usage notes | Use '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. |
See it in real clips
Frequently asked questions: Affirm vs Confirm
What's the difference between Affirm and Confirm?
Affirm: To say that something is true or to support it. Confirm: To say that something is true or to make sure of it.
Which is more common: Affirm and Confirm?
Confirm is the most common in everyday English.
Are Affirm and Confirm the same CEFR level?
Affirm: B1, Confirm: B1 on the CEFR scale.
What part of speech are Affirm and Confirm?
Affirm: verb, Confirm: verb.
Can you show an example of each?
Affirm: Both sides affirmed their commitment to the ceasefire. Confirm: Can you confirm the time for the meeting tomorrow?
Can I use Affirm and Confirm interchangeably?
Not always. Affirm and Confirm are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.