परन्तप scorcher of enemies, अविनीतानाम् of the haughty, विनेता a chastiser, असि ननु as such, एवंविधम् such, पापम् sinner, रावणम् Ravana, कथम् how is it, हि indeed, शासि you are not punishing?
O scorcher of enemies you are the chastiser of the haughty. Why do you not punish such a sinner like Ravana.