अन्वयः

विदितात्मना by one who knows the self, रामेण by Rama, सङ्ख्ये in a battle, खरश्च Khara, निहतः destroyed, त्रिशिराश्च and Trisira, निपातितः was killed, महातेजाः highly powerful, दूषणश्च Dooshana also.

M N Dutt

(It was for her) that fourteen thousand Rākşasas of terrible deeds were destroyed at Janasthāna with arrow resembling the flame of fire. And Khara was killed in battle, and Trisirā was discomfited and the mighty Dūşaņa by Rāma, knowing his ownself.

Summary

"Ogres like Khara and Trisira and the powerful Dooshana were kileed in battle by Rama endowed with selfknowledge.

पदच्छेदः

खरश्च	खर (१.१)–च (अव्ययः)
निहतः	निहत (√नि-हन् + क्त, १.१)
संख्ये	संख्य (७.१)
त्रिशिराश्च	त्रिशिरस् (१.१)–च (अव्ययः)
निपातितः	निपातित (√नि-पातय् + क्त, १.१)
दूषणश्च	दूषण (१.१)–च (अव्ययः)
महातेजा	महत्–तेजस् (१.१)
रामेण	राम (३.१)
विदितात्मना	विदित (√विद् + क्त)–आत्मन् (३.१)

छन्दः

अनुष्टुप् [८]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८
ख	र	श्च	नि	ह	तः	सं	ख्ये
त्रि	शि	रा	श्च	नि	पा	ति	तः
दू	ष	ण	श्च	म	हा	ते	जा
रा	मे	ण	वि	दि	ता	त्म	ना