महाभारतः mahābhārataḥ - book-4, chapter-53, verse-40

युद्धं समभवत्तत्र सुसंरब्धं महात्मनोः ।
द्रोणपाण्डवयोर्घोरं वृत्रवासवयोरिव ॥४०॥

40. yuddhaṁ samabhavattatra susaṁrabdhaṁ mahātmanoḥ ,
droṇapāṇḍavayorghoraṁ vṛtravāsavayoriva.

40. yuddhaṃ samabhavat tatra susaṃrabdhaṃ mahātmanoḥ
droṇapāṇḍavayoḥ ghoraṃ vṛtravāsavayoḥ iva

40. There, a fierce and terrible battle erupted between the two great souls, Drona and the Pandava (Arjuna), just like the one between Vritra and Vasava (Indra).

Words meanings summery:

• युद्धं (yuddhaṁ) - battle, combat, war

• समभवत् (samabhavat) - erupted (occurred, happened, arose)

• तत्र (tatra) - there, in that place

• सुसंरब्धं (susaṁrabdhaṁ) - fiercely commenced (referring to the battle) (fiercely commenced, greatly enraged, very violent)

• महात्मनोः (mahātmanoḥ) - of Drona and Arjuna (of the great souls, of the high-minded ones)

• द्रोणपाण्डवयोः (droṇapāṇḍavayoḥ) - of Drona and the Pandava

• घोरं (ghoraṁ) - terrible, fierce, dreadful

• वृत्रवासवयोः (vṛtravāsavayoḥ) - of Vritra and Vasava (Indra)

• इव (iva) - like, as, as if

Words meanings and morphology

युद्धं (yuddhaṁ) - battle, combat, war

(noun)

Nominative, neuter, singular of yuddha

yuddha - battle, combat, war

Root: yudh (class 4)

Note: Subject of samabhavat.

समभवत् (samabhavat) - erupted (occurred, happened, arose)

(verb)

3rd person , singular, active, past imperfect (laṅ) of sambhū

Imperfect, 3rd person singular, active voice

Prefix: sam

Root: bhū (class 1)

तत्र (tatra) - there, in that place

(indeclinable)

सुसंरब्धं (susaṁrabdhaṁ) - fiercely commenced (referring to the battle) (fiercely commenced, greatly enraged, very violent)

(adjective)

Nominative, neuter, singular of susaṃrabdha

susaṁrabdha - very agitated, fiercely commenced, greatly enraged

Compound type : pravādi (su+saṃrabdha)

• su – good, well, very
  indeclinable
• saṃrabdha – agitated, enraged, commenced (fiercely)
  adjective
  Past Passive Participle
  Derived from sam-√rabh (to begin vigorously, to be enraged)
  Prefix: sam
  Root: rabh (class 1)

Note: Agrees with yuddhaṃ.

महात्मनोः (mahātmanoḥ) - of Drona and Arjuna (of the great souls, of the high-minded ones)

(noun)

Genitive, masculine, dual of mahātman

mahātman - great soul, high-minded, noble, supreme self (ātman)

Compound type : bahuvrihi (mahat+ātman)

• mahat – great, large
  adjective
• ātman – self, soul, spirit, essence (ātman)
  noun (masculine)

Note: Refers to Drona and Arjuna.

द्रोणपाण्डवयोः (droṇapāṇḍavayoḥ) - of Drona and the Pandava

(proper noun)

Genitive, masculine, dual of droṇapāṇḍava

droṇapāṇḍava - Drona and the Pandava

Compound type : dvandva (droṇa+pāṇḍava)

• droṇa – Drona (name of a preceptor)
  proper noun (masculine)
• pāṇḍava – descendant of Pandu (Arjuna in this context)
  proper noun (masculine)
  Derivative of Paṇḍu

Note: Specifying mahātmanoḥ.

घोरं (ghoraṁ) - terrible, fierce, dreadful

(adjective)

Nominative, neuter, singular of ghora

ghora - terrible, fierce, dreadful, awful

Note: Agrees with yuddhaṃ.

वृत्रवासवयोः (vṛtravāsavayoḥ) - of Vritra and Vasava (Indra)

(proper noun)

Genitive, masculine, dual of vṛtravāsava

vṛtravāsava - Vritra and Vasava

Compound type : dvandva (vṛtra+vāsava)

• vṛtra – Vritra (a powerful asura, adversary of Indra)
  proper noun (masculine)
• vāsava – Vasava (a name of Indra)
  proper noun (masculine)
  Derived from Vasu

Note: Part of the simile for comparison.

इव (iva) - like, as, as if

(indeclinable)