अन्वयः

वीरः brave, पवनात्मजः son of the Windgod, सः कपिः that Hanuman, वायुसेविते attended by the wind, पथि on the path, महाजवान् endowed with high speed, समाहितान् stable ones, विवर्तने in turning round, भारसहान् which could bear heavy loads, तान् those, अष्ट eight, हयान् horses, तलप्रहारैः by hitting with his palm, जघान killed

M N Dutt

And remaining in the path coursed by the air, that heroic monkey, the offspring of the Windgod, with his slaps slew his eight powerful and excellent steeds, capable of bearing pressure and trained to diverse circular movements.

Summary

Hanuman the brave son of the Windgod hit with his palm and killed the eight horses (yoked to Aksha's chariot) which had great speed were stable and had the capacity to bear heavy loads while turning round in the sky. (The battle was fought in the air since Hanuman leaped into the air and the demon hero had to resist him there).

पदच्छेदः

स	तद् (१.१)
तस्य	तद् (६.१)
तान्	तद् (२.३)
अष्टहयान्महाजवान्	अष्टन्–हय (२.३)–महत्–जव (२.३)
समाहितान्	समाहित (√समा-धा + क्त, २.३)
भारसहान्	भार–सह (२.३)
विवर्तने	विवर्तन (७.१)
जघान	जघान (√हन् लिट् प्र.पु. एक.)
वीरः	वीर (१.१)
पथि	पथिन् (७.१)
वायुसेविते	वायु–सेवित (√सेव् + क्त, ७.१)
तलप्रहारैः	तल–प्रहार (३.३)
पवनात्मजः	पवनात्मज (१.१)
कपिः	कपि (१.१)

छन्दः

वंशस्थम् [१२: जतजर]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८	९	१०	११	१२
स	त	स्य	ता	न	ष्ट	ह	या	न्म	हा	ज	वा
न्स	मा	हि	ता	न्भा	र	स	हा	न्वि	व	र्त	ने
ज	घा	न	वी	रः	प	थि	वा	यु	से	वि	ते
त	ल	प्र	हा	लैः	प	व	ना	त्म	जः	क	पिः
ज			त			ज			र