परवीरघ्न slayer of enemy heroes, अस्य कार्यस्य in this task, परिसाधने ability to succeed, त्वम् for you, एक एव single handed, पर्याप्तः कामम् to accomplish the desired object, ते to you, फलोदयः having succeed, यशस्यः you will be renowned.

'O Slayer of enemy heroes you have the ability to accomplsh this task singlehanded. By succeeding in accomplishing the objective you will become renowned (and not Rama).