अन्वयः

जघनम् the hips, गतया by touching, एकया by only one, नीलनागाभया which looked like a black serpent, वेण्या with a braid of hair, नीरदापाये at the close of rainy season, नीलया with a dark one, वनराज्या by a range of forest, महीमिव like the earth, सुखार्हाम् who deserves to be happy, दुःखसन्तप्ताम् burning in grief, व्यसनानाम् of worries, अकोविदाम् who had not experienced.

M N Dutt

Her braid of long hair resembling a black serpent falling on her back it appeared as if the Earth was filled with dark-blue forests on the disappearance of the rains.

Summary

She (from behind) appeared like the earth covered with a range of trees at the end of rainy season with her single long black braid touching her hips looking like a black serpent. She who deserved to be happy and had not experienced worries was burning in grief. (एकवेणी is a trait of a प्रोषितभर्तृका Sita who was forced to stay in Lanka was a प्रोषितभर्तृका नायिका.)

पदच्छेदः

नीलनागाभया	नील–नाग–आभ (३.१)
वेण्या	वेणी (६.१)
जघनं	जघन (२.१)
गतयैकया	गत (√गम् + क्त, ३.१)–एक (३.१)
सुखार्हां	सुख–अर्ह (२.१)
दुःखसंतप्तां	दुःख–संतप्त (√सम्-तप् + क्त, २.१)
व्यसनानाम्	व्यसन (६.३)
अकोविदाम्	अकोविद (२.१)

छन्दः

अनुष्टुप् [८]

छन्दोविश्लेषणम्

१	२	३	४	५	६	७	८
नी	ल	ना	गा	भ	या	वे	ण्या
ज	घ	नं	ग	त	यै	क	या
सु	खा	र्हां	दुः	ख	सं	त	प्तां
व्य	स	ना	ना	म	को	दि	वाम्