decorated with kohl —

 very dark —

I will make You look beautiful —

You attract —

You mesmerize —

as our youthful entity at thiruppādagam where he has taken permanent residence —

 she says – ŏh the youthful one who is present in thiruvāli that is surrounded by fields having flowers full of fragrance; —

 ŏh the proud one who resides firmly in vada thiruvĕngadam! ānd, —

we wont decorate our eyes; —

 black kuval̤ai flowers which shine like black pigment —

whose eyes were decorated with kohl —

 is the young boy. —

ŏh (nappinnai) who is having broad eyes decorated with mai (kājal) —

 Black in colour, having much fragrance, flailing in the air on ḥis back is the divine hair each of which is curled separately, —

king of vadamadhurai that is having ever present bhagavath sambandham —

in the huge mountain which is very dark like a black pigment —

 very dark —

like very dark color paste —

black/dark —

being black like pigment —