अन्वयः

केचित् a few, दशनागबलाः strength of ten elephants, केचित् some, दशगुणोत्तराः ten times more strong than others, केचित् a few, नागसहस्रस्य equal to thousand elephants in strength, तुल्यविक्रमाः endowed with great strength, बभूवुः were.

M N Dutt

Some had the strength of ten elephants; and some had strength ten times as much; and some of the monkeys-leaders there had the strength of a thousand elephants.

Summary

A few of them were having the strength of ten elephants, some had ten times more than others, and a few were endowed with great strength equal to thousand elephants.

पदच्छेदः

सन्ति	सन्ति (√अस् लट् प्र.पु. बहु.)
चौघबलाः	च (अव्ययः)–ओघ–बल (१.३)
केचित्	कश्चित् (१.३)
केचिच्	कश्चित् (१.३)
छतगुणोत्तराः	शत–गुण–उत्तर (१.३)

छन्दः

अनुष्टुप् [८]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८
द	श	ना	ग	ब	लाः	के	चि
त्के	चि	द्द	श	गु	णो	त्त	राः
के	चि	न्ना	ग	स	ह	स्र	स्य
ब	भू	वु	स्तु	ल्य	वि	क्र	माः