Salutations to Sri Krishna!
MEANING
SrI KulaSEkhara offers his salutations to SrI kRshNa using all the eight noun- cases (vibhakti-s) of the sanskRt language.
KRshNa: rakshatu na: jagat-guru:
Through the Nominative case (subject of a verb, prathamA-vibhakti:), the AzhvAr prays, “May SrI kRshNa, the Supreme Lord of the three universes, protect us”
Aham kRshNam namasyAmi:
Through the Accusative case (dvitIyA-vibhakti: denotes object of a verb) the AzhvAr says, “I salute kRshNa”.
KRshNEna amara-Satrava: vinihitA:
Using the Instrumental case (tRitIyA-vibhakti: denotes agent of an action; ‘by’, ‘with’), kulaSEkharAzhvAr referes to the dushTa-nigraha quality of SrIÂ kRshNa: “By kRshNa, enemies were killed.”
Tasmai  kRshNAya Nama:
Using the Dative case (caturthI-vibhakti: denotes destination of an action = ‘to’. denotes purpose of an action = ‘for’), KulaSEkharAzhvAr says, “For that (dushTa-nigraha quality) I offer my worship in words To kRshNa”.
KRshNAt Eva samutthitam idam jagat
Using the ablative case (pancamI-vibhakti; expresses the relation ‘from’;) the AzhvAr refers to the celebrated fact that the universes originated from kRshNa only.
Aham kRshNasya dasa: asmi
Using the Possessive/Gentive case (shashThI-vibhakti:; denotes possession – ‘of’) SrI KulaSEkhara says, “I am a servant of kRshNa”.
Etat sarvam akhilam kRshNE tishThati
Using  the  Locative  case  (saptamI-vibhatI;  denotes  location-‘in’,’at’…)  SrI KulaSEkhara states that this whole universe is deeply rooted in kRshNa.
HE kRshNa! mAm samraksha
Finally overcome by the blissful thoughts on SrI kRshNa, (using the Denominative case or sambOdhanam) the AzhvAr begs humbly for the protection of the Lord.
This verse is not only a testimony to the poetic skills of SrI KulaSEkharar, but also an illustrious example of his Supreme kRshNa-bhakti.
Commentary by: Sri Oppiliappan Koil VaradAchAri Sadagopan
