Apologize vs I am so sorry

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

Apologize

Top 1,000 (very common)B1verb

I am so sorry

Top 2,000 (common)
Most common: Apologize
 ApologizeI am so sorry
Pronunciation🇬🇧 /["/əˈpɒlədʒaɪz/","/əˈpɒlədʒaɪzɪz/","/əˈpɒlədʒaɪzd/","/əˈpɒlədʒaɪzɪŋ/"]/🇺🇸 /["/əˈpɑːlədʒaɪz/","/əˈpɑːlədʒaɪzɪz/","/əˈpɑːlədʒaɪzd/","/əˈpɑːlədʒaɪzɪŋ/"]/🇬🇧 //aɪ æm səʊ ˈsɒr.i//🇺🇸 //aɪ æm soʊ ˈsɔr.i//
MeaningTo say sorry for something you did wrong.I feel bad for what I did.
ExampleI had to apologize to her for breaking her favorite vase.I am so sorry for arriving late to the meeting.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelB1-
Part of speechverb
Collocationssincerely, profusely, humbly, ought to, should, want to, for, to, I do apologize, I must apologizedeeply sorry, truly sorry, very sorry
Antonymsignore, offend, upsetunapologetic, indifferent, unremorseful
Common mistakesConfusing 'apologize' with 'apology' (the noun form)., Using 'apologize' without specifying whom you are apologizing to., Mistakenly using past tense 'apologized' when 'apologize' is correct in present tense.Using 'sorry' without the subject, 'I am sorry' is more polite., Confusing with 'excuse me' which is less formal., Overusing this phrase in situations where a simple 'thanks' suffices.
Usage notesUse 'apologize' in situations where you need to express regret for your actions. It's appropriate in both formal and informal contexts, but be cautious using it in very casual situations where slang may be preferred.Use this phrase when you apologize; it is suitable in most situations, personal or professional. Avoid in casual or joking contexts, where a lighter phrase might be appropriate.

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Apologize
I am so sorry

Frequently asked questions: Apologize vs I am so sorry

What's the difference between Apologize and I am so sorry?

Apologize: To say sorry for something you did wrong. I am so sorry: I feel bad for what I did.

Which is more common: Apologize and I am so sorry?

Apologize is the most common in everyday English.

Can you show an example of each?

Apologize: I had to apologize to her for breaking her favorite vase. I am so sorry: I am so sorry for arriving late to the meeting.

Can I use Apologize and I am so sorry interchangeably?

Not always. Apologize and I am so sorry 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.

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