Formal:
* Namaskaram (നമസ്കാരം) - This is the most formal greeting, used for elders or people you don't know well. It translates to "greetings" or "salutations."
* Shubhapraatham (ശുഭപ്രതം) - This means "good morning" and is also used as a formal greeting.
Informal:
* Ennikku (എന്നിക്ക്) - This is a more casual greeting, similar to "hello" in English. It literally means "to me."
* Sahayam (സഹായം) - This means "help" and is used as a casual greeting, especially among friends.
* Kettiyo (കെട്ടിയോ) - This is a very informal greeting, meaning "how are you?" or "what's up?" It is usually used among friends or family.
Other options:
* Shubhasandhya (ശുഭസന്ധ്യ) - This means "good evening" and can be used as a greeting.
* Shubharathri (ശുഭരാത്രി) - This means "good night" and can also be used as a greeting, especially in the evening.
It's always good to consider the context and your relationship with the person you are greeting when choosing a greeting in Malayalam.