महाभारतः mahābhārataḥ - book-7, chapter-163, verse-30

यद्यदस्त्रं स पार्थाय प्रयुङ्क्ते विजिगीषया ।
तस्यास्त्रस्य विघातार्थं तत्तत्स कुरुतेऽर्जुनः ॥३०॥

30. yadyadastraṁ sa pārthāya prayuṅkte vijigīṣayā ,
tasyāstrasya vighātārthaṁ tattatsa kurute'rjunaḥ.

30. yadyat astram sa pārthāya prayuṅkte vijigīṣayā
tasya astrasya vighātārtham tattat sa kurute arjunaḥ

30. sa yadyat astram vijigīṣayā pārthāya prayuṅkte sa
arjunaḥ tasya astrasya vighātārtham tattat kurute

30. Whatever weapon he (Drona) launched at Arjuna (Partha) with a desire for victory, Arjuna, for the purpose of counteracting that very weapon, rendered it ineffective.

Words meanings summery:

• यद्यत् (yadyat) - whatever, whichever

• अस्त्रम् (astram) - a missile, a weapon

• स (sa) - he (Drona) (he)

• पार्थाय (pārthāya) - to Partha, for Partha (Arjuna)

• प्रयुङ्क्ते (prayuṅkte) - launched (employs, discharges, uses)

• विजिगीषया (vijigīṣayā) - with a desire for victory, intending to conquer

• तस्य (tasya) - of Drona's (weapon) (his, of him)

• अस्त्रस्य (astrasya) - of the weapon

• विघातार्थम् (vighātārtham) - for the purpose of counteracting (for the purpose of striking down/destroying/counteracting)

• तत्तत् (tattat) - that very (weapon) (that very one, each and every)

• स (sa) - he (Arjuna) (he)

• कुरुते (kurute) - rendered ineffective (does, performs, makes)

• अर्जुनः (arjunaḥ) - Arjuna

Words meanings and morphology

यद्यत् (yadyat) - whatever, whichever

(indeclinable)

reduplication of yad for distributive sense

Note: Functions like an adjective to 'astram'.

अस्त्रम् (astram) - a missile, a weapon

(noun)

Accusative, neuter, singular of astra

astra - a missile, a weapon (especially a magical or divine one)

स (sa) - he (Drona) (he)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, it

पार्थाय (pārthāya) - to Partha, for Partha (Arjuna)

(proper noun)

Dative, masculine, singular of pārtha

pārtha - son of Pṛthā (Kunti), Arjuna

derived from Pṛthā

प्रयुङ्क्ते (prayuṅkte) - launched (employs, discharges, uses)

(verb)

3rd person , singular, middle, present (laṭ) of yuj

present indicative, 3rd person singular, middle voice, with prefix pra

Prefix: pra

Root: yuj (class 7)

विजिगीषया (vijigīṣayā) - with a desire for victory, intending to conquer

(noun)

Instrumental, feminine, singular of vijigīṣā

vijigīṣā - desire for victory, ambition to conquer

desiderative noun

from desiderative stem of vi-ji (to conquer)

Prefix: vi

Root: ji (class 1)

तस्य (tasya) - of Drona's (weapon) (his, of him)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, it

अस्त्रस्य (astrasya) - of the weapon

(noun)

Genitive, neuter, singular of astra

astra - a missile, a weapon (especially a magical or divine one)

विघातार्थम् (vighātārtham) - for the purpose of counteracting (for the purpose of striking down/destroying/counteracting)

(noun)

Accusative, neuter, singular of vighātārtha

vighātārtha - purpose of destruction, aim of counteraction

Compound type : tatpuruṣa (vighāta+artha)

• vighāta – striking down, destruction, obstruction, counteraction
  noun (masculine)
  verbal noun
  from vi-han
  Prefix: vi
  Root: han (class 2)
• artha – purpose, aim, meaning
  noun (masculine)

Note: Used adverbially to indicate purpose.

तत्तत् (tattat) - that very (weapon) (that very one, each and every)

(pronoun)

Accusative, neuter, singular of tattad

tattad - that very one, each and every one (distributive)

reduplication of tad for distributive sense

स (sa) - he (Arjuna) (he)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, it

कुरुते (kurute) - rendered ineffective (does, performs, makes)

(verb)

3rd person , singular, middle, present (laṭ) of kṛ

present indicative, 3rd person singular, middle voice

Root: kṛ (class 8)

अर्जुनः (arjunaḥ) - Arjuna

(proper noun)

Nominative, masculine, singular of arjuna

arjuna - Arjuna (name of a Pandava prince), white, silver