Formal:
* ନମସ୍କାର (namaskaar) - This is the most formal greeting, similar to "good morning" or "good evening" in English. It's used for elders or people you don't know well.
Informal:
* ସୁପ୍ରଭାତ (suprabhaat) - This means "good morning".
* ଶୁଭସନ୍ଧ୍ୟା (shubhasandhya) - This means "good evening".
* ଶୁଭରାତ୍ରି (shubharatri) - This means "good night".
* କିଛି କହିବାକୁ ନାହିଁ (kichhi kahibaaku nahi) - This literally means "nothing to say", but it's used as a casual greeting similar to "hello".
Friendly:
* ଆପଣଙ୍କୁ ସାଦର (apananku sadara) - This means "welcome" or "nice to see you".
You can also use the more casual " ହେ (he) ", similar to "hey" in English.
Tips:
* It's polite to use formal greetings when speaking to elders or people you don't know well.
* You can use informal greetings with friends and family.
* When greeting someone, it's common to put your hands together in a prayer position and say "namaskaar" or "sadara".
Hope this helps!