Formal:
* ਦਾਦਾ ਜੀ (Dada Ji): This is the most common and respectful way to address a grandfather. It is often used for the father's father.
* ਨਾਨਾ ਜੀ (Nana Ji): This is also respectful and is used for the mother's father.
Informal:
* ਦਾਦਾ (Dada): A more casual way to address your grandfather, used for the father's father.
* ਨਾਨਾ (Nana): A more casual way to address your grandfather, used for the mother's father.
* ਜੱਦਾ (Jadda): This is another informal term for grandfather, but it's less common than "Dada" or "Nana."
* ਪੁਰਾਣਾ (Puraana): This literally means "old one" and is sometimes used to refer to a grandfather, but it can also be used for any elderly person.
The choice of term depends on the speaker's relationship with the grandfather and the context of the conversation.