महाभारतः mahābhārataḥ - book-6, chapter-83, verse-20

अथेतरे महेष्वासाः सहसैन्या नराधिपाः ।
व्यूहं तं पूरयामासुर्व्यूहशास्त्रविशारदाः ॥२०॥

20. athetare maheṣvāsāḥ sahasainyā narādhipāḥ ,
vyūhaṁ taṁ pūrayāmāsurvyūhaśāstraviśāradāḥ.

20. atha itare maheṣvāsāḥ sahasainyāḥ narādhipāḥ
vyūham tam pūrayāmāsuḥ vyūhaśāstraviśāradāḥ

20. atha itare maheṣvāsāḥ sahasainyāḥ narādhipāḥ
vyūhaśāstraviśāradāḥ tam vyūham pūrayāmāsuḥ

20. Then the other great archers and rulers, accompanied by their forces and skilled in the science of battle formations, filled that array.

Words meanings summery:

• अथ (atha) - then, indicating a sequence of events (then, now, thus, moreover)

• इतरे (itare) - the other (kings/archers) (the others)

• महेष्वासाः (maheṣvāsāḥ) - great archers (referring to the other kings) (great archers)

• सहसैन्याः (sahasainyāḥ) - along with their own troops (accompanied by their armies, with their forces)

• नराधिपाः (narādhipāḥ) - the kings or rulers (among the Pāṇḍava forces) (kings, rulers of men)

• व्यूहम् (vyūham) - the battle formation (battle formation, array, disposition)

• तम् (tam) - that (specific battle formation) (that, him)

• पूरयामासुः (pūrayāmāsuḥ) - they filled (the formation) (they filled)

• व्यूहशास्त्रविशारदाः (vyūhaśāstraviśāradāḥ) - highly skilled in the knowledge of battle array strategies (skilled in the science of battle formations)

Words meanings and morphology

अथ (atha) - then, indicating a sequence of events (then, now, thus, moreover)

(indeclinable)

इतरे (itare) - the other (kings/archers) (the others)

(pronoun)

Nominative, masculine, plural of itara

itara - other, another, different

महेष्वासाः (maheṣvāsāḥ) - great archers (referring to the other kings) (great archers)

(noun)

Nominative, masculine, plural of maheṣvāsa

maheṣvāsa - a great archer, having a large bow

Compound type : bahuvrihi (mahat+iṣvāsa)

• mahat – great, large, mighty
  adjective (neuter)
• iṣvāsa – bow (of an archer)
  noun (masculine)

सहसैन्याः (sahasainyāḥ) - along with their own troops (accompanied by their armies, with their forces)

(adjective)

Nominative, masculine, plural of sahasainya

sahasainya - accompanied by an army, with one's forces

Compound type : bahuvrihi (sa+sainya)

• sa – with, together with, accompanied by
  indeclinable
  Prefix indicating accompaniment.
• sainya – army, host, forces
  noun (neuter)

Note: Qualifies 'narādhipāḥ'.

नराधिपाः (narādhipāḥ) - the kings or rulers (among the Pāṇḍava forces) (kings, rulers of men)

(noun)

Nominative, masculine, plural of narādhipa

narādhipa - ruler of men, king, prince

Compound type : tatpurusha (nara+adhipa)

• nara – man, human being
  noun (masculine)
• adhipa – ruler, lord, master
  noun (masculine)
  Prefix: adhi

व्यूहम् (vyūham) - the battle formation (battle formation, array, disposition)

(noun)

Accusative, masculine, singular of vyūha

vyūha - arrangement, disposition, battle array, formation

From vi + ūh (to arrange, push).

Prefix: vi

Root: ūh (class 1)

Note: Object of 'pūrayāmāsuḥ'.

तम् (tam) - that (specific battle formation) (that, him)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

Note: Qualifies 'vyūham'.

पूरयामासुः (pūrayāmāsuḥ) - they filled (the formation) (they filled)

(verb)

3rd person , plural, active, perfect (lit) of pūr

Perfect tense, 3rd person plural, active voice. Formed from Causal stem 'pūrayā' + Ās (auxiliary verb).

Root: pṛ (class 9)

व्यूहशास्त्रविशारदाः (vyūhaśāstraviśāradāḥ) - highly skilled in the knowledge of battle array strategies (skilled in the science of battle formations)

(adjective)

Nominative, masculine, plural of vyūhaśāstraviśārada

vyūhaśāstraviśārada - skilled in the science of military arrays

Compound type : tatpurusha (vyūha+śāstra+viśārada)

• vyūha – battle array, formation
  noun (masculine)
  From vi + ūh (to arrange, push).
  Prefix: vi
  Root: ūh (class 1)
• śāstra – science, treatise, system of knowledge
  noun (neuter)
• viśārada – skilled, expert, proficient
  adjective (masculine)

Note: Qualifies 'maheṣvāsāḥ' and 'narādhipāḥ'.