How do you say good afternoon in Malayalam?

There are a few ways to say "good afternoon" in Malayalam, depending on the level of formality you want to use:

Formal:

* നല്ല ഉച്ചയ്ക്ക്‌ (nalla ucchikka) - This is the most formal way to say "good afternoon".

Informal:

* നല്ല ഉച്ചക്ക്‌ (nalla ucchikka) - This is a slightly less formal way to say "good afternoon".

* ഉച്ചക്ക്‌ നല്ലതാണ്‌ (ucchikka nallaataan) - This translates directly to "afternoon is good", and is a more casual way to say "good afternoon".

You can also use a more informal greeting like "എങ്ങനെയുണ്ട്?" (enggane undu?) which means "how are you?" to start a conversation in the afternoon.

Remember, the best way to greet someone is based on your relationship with them and the context of the situation.