Mother's side:
* Moothamama (മൂത്തമ്മ): This is the most common term for a cousin sister on the mother's side. It literally means "elder sister".
* Kuttiamma (കുട്ടിയമ്മ): This means "younger sister" and is used for a cousin sister younger than you.
* Sahodari (സഹോദരി): This is a more formal term for a cousin sister, meaning "sister".
Father's side:
* Chachi (ചാച്ചി): This is the term for a cousin sister on the father's side.
It's important to note that the specific term used may vary depending on the family and region.