अन्वयः

अक्षया: imperishable, बलवन्तश्च: strong and mighty, शूरा: warriors, लब्धवराः who had obtained boon, त्वया: by you, संवत्सरं: one year, युद्ध्वा: fighting, पुनः again, समरे: in war, दानवा: Danavas, विभो: Oh Lord.

M N Dutt

Those heroic Dänavas, the Kālakeyas, were greatly powerful, irrepressible, and proud of the boons conferred on them. And fighting with them perpetually for a year, you did bring them under your control, O lord, O slayer of foes, and learn from them the science o varied illusions, O king of the Rākşasas.

Summary

"The mighty and strong Danava warriors who had obtained boon were made to fight a war by you for one year."

पदच्छेदः

अक्षया	अक्षय (१.३)
बलवन्तश्च	बलवत् (१.३)–च (अव्ययः)
शूरा	शूर (१.३)
लब्धवराः	लब्ध (√लभ् + क्त)–वर (१.३)
पुनः	पुनर् (अव्ययः)
त्वया	त्वद् (३.१)
संवत्सरं	संवत्सर (२.१)
युद्ध्वा	युद्ध्वा (√युध् + क्त्वा)
समरे	समर (७.१)
दानवा	दानव (१.३)
विभो	विभु (८.१)

छन्दः

अनुष्टुप् [८]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८
अ	क्ष	या	ब	ल	व	न्त	श्च
शू	रा	ल	ब्ध	व	राः	पु	नः
त्व	या	सं	व	त्स	रं	यु	द्ध्वा
स	म	रे	दा	न	वा	वि	भो