This is a song from movie Anjaathe (an excellent movie btw).
This is not actual song per se, but instead a composition by Mahakavi Bharathiyar that's been used with some music for title track of the movie. Though I find it hard to understand all of it, here is my attempt to write down the lyrics for people who are searching for the same. The song is very well done and sung excellently by director Mysskin (yes the Director himself sung the song).
Anyway here goes, if there needs to be correction kindly provide information and I will be glad.
Achcham thavir naiya pudai
maanam poatru routhiram azhagu (2 times)
Aanmai thavarea aazhndhu nadavea
soozhurai poatru thiyoarku anjea
Achcham Tavir..............
Oidhal oli nearpada peasa
thaazhndhu nadavea saavadharku anjea (2 times)
Kaalam aliyea keezhoarkku anjea
pOr thozhi pazhagu thOlviyil kalangea
Pudhiyana virumbu veeriyam perukku
keduppadhu soarvu unmaikku anjea (2 times)
Vedipara paesu nandru karudhu
vavvudhal neekku thavaththina nirappu nee
Katradhu ozhugu kaithozhil pOtru
searkay ariyea peaigalukku anjea (2 times)
Gnaayiru poatru mandhiram valimai
savuriyam thavarea naal ellaam mei sei
naal ellaam mei sei
Achcham Tavir.........
