Formal:
* స్వాగతం (Swagatam): This is the most common and formal way to say "welcome." It can be used in any situation where you want to be polite and respectful.
Informal:
* వెల్కమ్ (Welkam): This is the English word "welcome" adopted into Telugu. It's commonly used in informal settings and with friends.
* వచ్చారు/వచ్చావు (Vacchāru/Vacchāvu): This literally means "you came" and is a more informal way to express welcome, particularly when someone arrives at your house or event.
* ధన్యవాదాలు (Dhan'yavādalu): This means "thank you," but can also be used as a way of saying "welcome" when someone thanks you for something.
Choosing the right phrase:
* If you're unsure which phrase to use, "Swagatam" is always a safe bet as it's the most formal and universally understood.
* "Welkam" is appropriate in casual settings.
* "Vacchāru/Vacchāvu" is mainly used when someone arrives.
* "Dhan'yavādalu" is a more indirect way to express welcome, but it's commonly understood.
You can also combine "Swagatam" with a specific word like "mīku" (to you) or "meeru" (you) for a more personalized greeting:
* మీకు స్వాగతం (Mīku Swagatam): Welcome to you.
* మీరు స్వాగతం (Mīru Swagatam): Welcome, you.
Remember, the most important thing is to be sincere and hospitable!