Husband's sister:
* Bhaginima: This is the most common and general term for a sister-in-law, referring to your husband's sister.
* Bhavi: This is a more informal and affectionate term for a sister-in-law.
Wife's sister:
* Nanandini: This term specifically refers to your wife's sister.
It's important to note that the specific term used can vary depending on the family's customs and the speaker's relationship with the sister-in-law.
For example, you might use "Bhaginima" when speaking formally but "Bhavi" when speaking casually.