महाभारतः mahābhārataḥ - book-7, chapter-117, verse-25

तौ पृथक्शरवर्षाभ्यामवर्षेतां परस्परम् ।
उत्तमाभिजनौ वीरौ कुरुवृष्णियशस्करौ ॥२५॥

25. tau pṛthakśaravarṣābhyāmavarṣetāṁ parasparam ,
uttamābhijanau vīrau kuruvṛṣṇiyaśaskarau.

25. tau pṛthak śaravarṣābhyām avarṣetām parasparam
uttamābhijanau vīrau kuruvṛṣṇiyaśaskarau

25. tau vīrau uttamābhijanau kuruvṛṣṇiyaśaskarau
pṛthak śaravarṣābhyām parasparam avarṣetām

25. Those two heroes, both of noble birth and enhancers of the glory of the Kurus and Vṛṣṇis, rained showers of arrows upon each other.

Words meanings summery:

• तौ (tau) - those two (Sātyaki and Saumadatti) (those two)

• पृथक् (pṛthak) - separately (separately, apart, distinctly)

• शरवर्षाभ्याम् (śaravarṣābhyām) - with showers of arrows

• अवर्षेताम् (avarṣetām) - they rained (showers of arrows) (they rained, they showered)

• परस्परम् (parasparam) - upon each other (mutually, reciprocally, each other)

• उत्तमाभिजनौ (uttamābhijanau) - of noble birth (of excellent lineage, of noble birth)

• वीरौ (vīrau) - two heroes

• कुरुवृष्णियशस्करौ (kuruvṛṣṇiyaśaskarau) - enhancers of the glory of the Kurus and Vṛṣṇis (increasing the glory of the Kurus and Vṛṣṇis)

Words meanings and morphology

तौ (tau) - those two (Sātyaki and Saumadatti) (those two)

(pronoun)

Nominative, masculine, dual of tad

tad - that, those

Demonstrative pronoun.

Note: Subject.

पृथक् (pṛthak) - separately (separately, apart, distinctly)

(indeclinable)

शरवर्षाभ्याम् (śaravarṣābhyām) - with showers of arrows

(noun)

Instrumental, feminine, dual of śaravarṣā

śaravarṣā - shower of arrows

Compound type : ṣaṣṭhī-tatpuruṣa (śara+varṣā)

• śara – arrow
  noun (masculine)
• varṣā – rain, shower, rainy season
  noun (feminine)
  Root: vṛṣ (class 1)

Note: Instrument of the action 'raining'.

अवर्षेताम् (avarṣetām) - they rained (showers of arrows) (they rained, they showered)

(verb)

3rd person , dual, middle, imperfect (laṅ) of √vṛṣ

Imperfect tense, 3rd person dual, middle voice.

From √vṛṣ, class 1, Atmanepada.

Root: vṛṣ (class 1)

Note: Main verb.

परस्परम् (parasparam) - upon each other (mutually, reciprocally, each other)

(indeclinable)

Sometimes also treated as a pronoun-like word.

Note: Indicates reciprocal action.

उत्तमाभिजनौ (uttamābhijanau) - of noble birth (of excellent lineage, of noble birth)

(adjective)

Nominative, masculine, dual of uttamābhijana

uttamābhijana - of excellent lineage, high-born

Compound type : karmadhāraya (uttama+abhijana)

• uttama – best, excellent, highest
  adjective (masculine)
  Superlative of ud (up/out).
• abhijana – lineage, family, noble birth, ancestry
  noun (masculine)
  Prefix: abhi
  Root: jan (class 4)

Note: Describes the two warriors.

वीरौ (vīrau) - two heroes

(noun)

Nominative, masculine, dual of vīra

vīra - hero, brave, mighty, warrior

Note: Refers to Sātyaki and Saumadatti.

कुरुवृष्णियशस्करौ (kuruvṛṣṇiyaśaskarau) - enhancers of the glory of the Kurus and Vṛṣṇis (increasing the glory of the Kurus and Vṛṣṇis)

(adjective)

Nominative, masculine, dual of kuruvṛṣṇiyaśaskara

kuruvṛṣṇiyaśaskara - causing fame/glory to Kurus and Vṛṣṇis

Compound type : tatpuruṣa (kuru+vṛṣṇi+yaśas+kara)

• kuru – name of an ancient king, a dynasty
  proper noun (masculine)
• vṛṣṇi – name of an ancient king, a Yadava clan
  proper noun (masculine)
• yaśas – fame, glory, renown, honor
  noun (neuter)
• kara – making, causing, doing, a doer
  adjective (masculine)
  Derived from root √kṛ (to do, make) with suffix -a.
  Root: kṛ (class 8)

Note: Describes the two warriors.