However, it's important to note that "yaa-nai" actually means "elephant." In Tamil, there isn't a specific word for buffalo.
Instead, you can use the following terms:
* காளை (kaalai) - This refers to a male buffalo.
* மாடு (maa-du) - This refers to a cow or a female buffalo.
* எருமை (eru-mai) - This is a general term for buffalo, but it's not as commonly used as the other terms.
Therefore, depending on the context, you can use any of these terms to refer to a buffalo in Tamil.