महाभारतः mahābhārataḥ - book-7, chapter-146, verse-47

उभयोः सेनयोर्मध्ये नराश्वद्विपवाहिनी ।
यथा वैतरणी राजन्यमराष्ट्रपुरं प्रति ॥४७॥

47. ubhayoḥ senayormadhye narāśvadvipavāhinī ,
yathā vaitaraṇī rājanyamarāṣṭrapuraṁ prati.

47. ubhayoḥ senayoḥ madhye narāśvadvipavāhinī
yathā vaitaraṇī rājan yamarāṣṭrapuraṃ prati

47. rājan ubhayoḥ senayoḥ madhye narāśvadvipavāhinī
yathā yamarāṣṭrapuraṃ prati vaitaraṇī

47. O king, the army composed of men, horses, and elephants, situated between the two forces, resembled the river Vaitaraṇī leading towards the city of Yama's kingdom.

Words meanings summery:

• उभयोः (ubhayoḥ) - of both

• सेनयोः (senayoḥ) - of the armies

• मध्ये (madhye) - in the middle, amidst, among

• नराश्वद्विपवाहिनी (narāśvadvipavāhinī) - an army of men, horses, and elephants

• यथा (yathā) - as, just as, like

• वैतरणी (vaitaraṇī) - the river Vaitaraṇī

• राजन् (rājan) - O king

• यमराष्ट्रपुरं (yamarāṣṭrapuraṁ) - to the city of Yama's realm

• प्रति (prati) - towards, against, concerning

Words meanings and morphology

उभयोः (ubhayoḥ) - of both

(pronoun)

Genitive, dual of ubha

ubha - both

A pronominal adjective, declined similar to a pronoun.

सेनयोः (senayoḥ) - of the armies

(noun)

Genitive, feminine, dual of senā

senā - army, host, troop

मध्ये (madhye) - in the middle, amidst, among

(indeclinable)

Locative singular of madhya used adverbially.

नराश्वद्विपवाहिनी (narāśvadvipavāhinī) - an army of men, horses, and elephants

(noun)

Nominative, feminine, singular of narāśvadvipavāhinī

narāśvadvipavāhinī - army of men, horses, and elephants

Compound type : tatpuruṣa (nara+aśva+dvipa+vāhinī)

• nara – man, human
  noun (masculine)
• aśva – horse
  noun (masculine)
• dvipa – elephant (lit. 'two-drinker' or 'two-tusked')
  noun (masculine)
  From dvi + pa (drinker or tooth).
• vāhinī – army, host, current (of water)
  noun (feminine)
  Derived from root vah 'to carry'.
  Root: vah (class 1)

यथा (yathā) - as, just as, like

(indeclinable)

वैतरणी (vaitaraṇī) - the river Vaitaraṇī

(proper noun)

Nominative, feminine, singular of vaitaraṇī

vaitaraṇī - the mythical river of hell, which souls must cross to reach Yama's realm

राजन् (rājan) - O king

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler

Root: rāj

यमराष्ट्रपुरं (yamarāṣṭrapuraṁ) - to the city of Yama's realm

(noun)

Accusative, neuter, singular of yamarāṣṭrapura

yamarāṣṭrapura - city of Yama's kingdom/realm

Compound type : tatpuruṣa (yama+rāṣṭra+pura)

• yama – Yama (the god of death and justice)
  proper noun (masculine)
• rāṣṭra – kingdom, realm, country
  noun (neuter)
• pura – city, town, stronghold
  noun (neuter)

Note: Refers to the destination towards which the river flows.

प्रति (prati) - towards, against, concerning

(indeclinable)

Used as a preposition governing the accusative case.