Formal:
* 太太 (taai3 taai3): This is the most formal way to refer to someone's wife, often used by strangers or people of a higher social status. It literally means "Mrs.".
* 夫人 (fu4 yan2): Similar to "太太", this is also a formal term, often used in official settings. It translates to "Madam".
Informal:
* 老婆 (lou5 po2): This is the most common and informal way to refer to one's wife, often used by friends and family. It literally means "old woman" but is not considered disrespectful.
* 阿嫂 (aa3 sou3): This term is used to refer to the wife of one's older brother or someone of a similar age. It can be used in both formal and informal settings.
Other options:
* 老伴 (lou5 baan6): This literally means "old companion" and is a more affectionate way to refer to one's wife, especially if they are older.
* 愛人 (oi3 yan2): This is a more romantic term that translates to "lover" or "beloved".
Note: The best way to choose the appropriate term is to consider the context and your relationship with the person you are talking to.
Remember that Cantonese is a tonal language, so the pronunciation is important. You can find audio recordings of these terms online to help you learn the correct pronunciation.