Formal:
* 唔該晒 (m̄-gāi-saai): This is the most common and polite way to apologize. It literally means "thank you very much," but is often used as a general apology.
* 對唔住 (deoi m̄-jyu): This means "I'm sorry," and is slightly more direct than "唔該晒". It's still polite but less formal.
Informal:
* 唔好意思 (m̄-hóu-jī): This means "excuse me," but is also used as a casual apology. It's less formal than "唔該晒" and "對唔住".
* 唔該 (m̄-gāi): This is a shorter version of "唔該晒" and can be used as a quick apology, but it's not as formal.
Other options:
* 我錯咗 (ngōh coek jǒ): This means "I was wrong" and is a more specific apology, acknowledging responsibility.
* 我真係好抱歉 (ngōh jān-cī hòu pou-chín): This means "I am really very sorry" and is the most sincere and heartfelt apology.
The best way to say "I am sorry" in Cantonese will depend on the context and the relationship between the speaker and the person they are apologizing to.