The Panchakshara (पञ्चाक्षर) literally means “five letters” in Sanskrit and refers to the five holy letters Na, Ma, Śi, Vā and Ya. This is prayer to Lord Siva and is associated with Siva’s Mantra , OM Namah Sivaya of which is also called the Panchakshari Mantra.
Here is a translation in Tamil of the epic Sthothram by Adi Sankaracharya
Prabhu's Ponder 
Soundar You are in spiritual overdrive Grateful Thanks for your painstaking scholarship which gives us so much of undiluted bliss DC
Thanks again 🙏. I am just following great leaders ahead of me
Day by Day You are reaching higher level in your spiritual learning & helping ordinary people like me to understand little
Thank you Sir for the words of encouragement