How do you call father in Malayalam?

There are a few ways to say "father" in Malayalam, depending on the context and level of formality:

* appa (അപ്പ): This is the most common and informal way to say "father." It's used by children and close family members.

* acchan (അച്ഛൻ): This is a more formal way to say "father," often used by adults or when addressing someone with respect.

* thande (തന്ത): This is a more poetic or literary way to say "father."

* pithamahan (പിതാമഹൻ): This literally means "grandfather" but can also be used as a more formal and respectful term for "father."

So, the best word to use will depend on the specific situation.