A few everyday Tamil phrases to get started (spoken forms, with a simple romanization):
    வணக்கம் (vanakkam) – Hello நன்றி (nandri) – Thank you எப்படி இருக்கீங்க? (eppadi irukkeenga?) – How are you? நல்லா இருக்கேன் (nalla irukken) – I'm fine போயிட்டு வரேன் (poyittu varen) – Goodbye, literally "I'll go and come back"
Tamil speakers: are there other greetings you use every day that learners should know? And learners: try writing a short greeting exchange in the replies, even just in romanization, and we'll help with it.