From the father's side:
* Dadaji (दादाजी): Grandfather
* Dadi (दादी): Grandmother
From the mother's side:
* Nana (नाना): Grandfather
* Nani (नानी): Grandmother
Note:
* These are the most common terms used in Hindi.
* There are also regional variations in how grandparents are addressed.
* You can also use "dada" (दादा) and "dadi" (दादी) for both maternal and paternal grandparents, but it's more common to use the specific terms mentioned above.