आशनिसन्निभः like thunderbolt, शरोत्तमः the great arrow, मृगरूपस्य assuming deer form, शरीरम् body, विनिर्भिद्य pierced, मारीचस्य Maricha's, हृदयमेव heart, बिभेद tore.

The great arrow which was like a thunderbolt first pierced into the body of Maricha who had assumed the form of a deer and then tore his heart.