महाभारतः mahābhārataḥ - book-2, chapter-24, verse-25

ऋषिकेषु तु संग्रामो बभूवातिभयंकरः ।
तारकामयसंकाशः परमर्षिकपार्थयोः ॥२५॥

25. ṛṣikeṣu tu saṁgrāmo babhūvātibhayaṁkaraḥ ,
tārakāmayasaṁkāśaḥ paramarṣikapārthayoḥ.

25. ṛṣikeṣu tu saṃgrāmaḥ babhūva atibhayaṃkaraḥ
tārakāmayasaṃkāśaḥ paramarṣikapārthayoḥ

25. Indeed, a most terrifying battle (saṃgrāmaḥ) occurred among the Rishikas, resembling the war of Tarakamaya, between the chief of the Rishikas and Pārtha (Arjuna).

Words meanings summery:

• ऋषिकेषु (ṛṣikeṣu) - among the Rishikas, in the country of the Rishikas

• तु (tu) - but, indeed, however

• संग्रामः (saṁgrāmaḥ) - battle, war, conflict

• बभूव (babhūva) - there was, it happened, it occurred

• अतिभयंकरः (atibhayaṁkaraḥ) - very dreadful, extremely terrifying, formidable

• तारकामयसंकाशः (tārakāmayasaṁkāśaḥ) - resembling the Tarakamaya War

• परमर्षिकपार्थयोः (paramarṣikapārthayoḥ) - between the chief Rishika and Pārtha (Arjuna)

Words meanings and morphology

ऋषिकेषु (ṛṣikeṣu) - among the Rishikas, in the country of the Rishikas

(proper noun)

Locative, masculine, plural of ṛṣika

ṛṣika - a particular people or country

Note: Locative of place.

तु (tu) - but, indeed, however

(indeclinable)

Note: Emphatic particle.

संग्रामः (saṁgrāmaḥ) - battle, war, conflict

(noun)

Nominative, masculine, singular of saṃgrāma

saṁgrāma - battle, war, conflict, struggle

Derived from saṃ- (together) + grāma (village, multitude), originally perhaps 'coming together of groups'

Prefix: sam

Root: kram (class 1)

Note: Subject of babhūva.

बभूव (babhūva) - there was, it happened, it occurred

(verb)

3rd person , singular, active, past perfect (lit) of bhū

Perfect Active Third Singular

Perfect tense, 3rd person, singular, active voice of root bhū

Root: bhū (class 1)

अतिभयंकरः (atibhayaṁkaraḥ) - very dreadful, extremely terrifying, formidable

(adjective)

Nominative, masculine, singular of atibhayaṃkara

atibhayaṁkara - very dreadful, extremely terrifying, formidable

Compound type : tatpuruṣa (ati+bhayaṃkara)

• ati – very, exceedingly, over
  indeclinable
• bhayaṃkara – terrifying, dreadful, formidable
  adjective (masculine)

Note: Modifies saṃgrāmaḥ.

तारकामयसंकाशः (tārakāmayasaṁkāśaḥ) - resembling the Tarakamaya War

(adjective)

Nominative, masculine, singular of tārakāmayasaṃkāśa

tārakāmayasaṁkāśa - resembling the Tarakamaya war

Compound type : bahuvrīhi (tārakāmaya+saṃkāśa)

• tārakāmaya – relating to the war with Tārakāsura (a demon)
  noun (masculine)
• saṃkāśa – resembling, like, similar
  adjective (masculine)
  Prefix: sam

Note: Modifies saṃgrāmaḥ.

परमर्षिकपार्थयोः (paramarṣikapārthayoḥ) - between the chief Rishika and Pārtha (Arjuna)

(noun)

Genitive, masculine, dual of paramarṣikapārtha

paramarṣikapārtha - between the chief Rishika and Pārtha

Compound type : dvandva (paramaṛṣika+pārtha)

• paramaṛṣika – chief of the Rishikas
  proper noun (masculine)
• pārtha – son of Pṛthā (Kuntī), Arjuna
  proper noun (masculine)
  Derived from Pṛthā + a (descendant)

Note: Indicates the two parties involved in the battle.