महाभारतः mahābhārataḥ - book-7, chapter-170, verse-51

यदि नारायणास्त्रस्य प्रतियोद्धा न विद्यते ।
अद्यैनं प्रतियोत्स्यामि पश्यत्सु कुरुपाण्डुषु ॥५१॥

51. yadi nārāyaṇāstrasya pratiyoddhā na vidyate ,
adyainaṁ pratiyotsyāmi paśyatsu kurupāṇḍuṣu.

51. yadi nārāyaṇāstrasya pratiyoddhā na vidyate
adya enam pratiyotsyāmi paśyatsu kurupāṇḍuṣu

51. yadi nārāyaṇāstrasya pratiyoddhā na vidyate
adya enam kurupāṇḍuṣu paśyatsu pratiyotsyāmi

51. If no warrior exists who can counteract the Nārāyaṇa missile (astra), then today I will fight against it, while the Kurus and Pāṇḍavas are watching.

Words meanings summery:

• यदि (yadi) - if, in case

• नारायणास्त्रस्य (nārāyaṇāstrasya) - of the Nārāyaṇa missile, of the weapon of Nārāyaṇa

• प्रतियोद्धा (pratiyoddhā) - a counter-fighter, opponent, one who fights back

• न (na) - not, no

• विद्यते (vidyate) - is found, exists, is present

• अद्य (adya) - today, now

• एनम् (enam) - referring to the Nārāyaṇa missile (astra) or the situation it represents (this (masculine singular accusative))

• प्रतियोत्स्यामि (pratiyotsyāmi) - I will fight against, I will counter-fight

• पश्यत्सु (paśyatsu) - while the Kurus and Pāṇḍavas are watching (while seeing, among those who are seeing)

• कुरुपाण्डुषु (kurupāṇḍuṣu) - among the Kurus and Pāṇḍavas

Words meanings and morphology

यदि (yadi) - if, in case

(indeclinable)

नारायणास्त्रस्य (nārāyaṇāstrasya) - of the Nārāyaṇa missile, of the weapon of Nārāyaṇa

(noun)

Genitive, neuter, singular of nārāyaṇāstra

nārāyaṇāstra - Nārāyaṇa's weapon, a missile associated with Viṣṇu/Nārāyaṇa

Compound type : tatpuruṣa (nārāyaṇa+astra)

• nārāyaṇa – a name of Viṣṇu, son of Nara
  proper noun (masculine)
• astra – weapon, missile
  noun (neuter)
  Root: as (class 4)

प्रतियोद्धा (pratiyoddhā) - a counter-fighter, opponent, one who fights back

(noun)

Nominative, masculine, singular of pratiyoddhṛ

pratiyoddhṛ - a counter-fighter, opponent

agent noun from prati-yudh

derives from the root yudh (to fight) with the prefix prati-

Prefix: prati

Root: yudh (class 4)

न (na) - not, no

(indeclinable)

विद्यते (vidyate) - is found, exists, is present

(verb)

3rd person , singular, middle, present indicative (laṭ) of vid

present passive/middle

ātmanepada, present indicative, 3rd person singular

Root: vid (class 4)

अद्य (adya) - today, now

(indeclinable)

एनम् (enam) - referring to the Nārāyaṇa missile (astra) or the situation it represents (this (masculine singular accusative))

(pronoun)

Accusative, masculine, singular of ena

ena - this, that

Note: Despite 'astra' being neuter, 'enam' (masc. acc. sg.) can be used to refer to it, sometimes implying the 'force' or 'essence' of the weapon, or general pronominal usage.

प्रतियोत्स्यामि (pratiyotsyāmi) - I will fight against, I will counter-fight

(verb)

1st person , singular, active, future indicative (lṛṭ) of pratiyudh

future active

`prati` + root `yudh`, 1st person singular

Prefix: prati

Root: yudh (class 4)

पश्यत्सु (paśyatsu) - while the Kurus and Pāṇḍavas are watching (while seeing, among those who are seeing)

(participle)

Locative, masculine, plural of paśyat

paśyat - seeing, looking

present active participle

From root `dṛś` (to see), with `paśya` stem used for present tense

Root: dṛś (class 1)

Note: Refers to `kurupāṇḍuṣu`.

कुरुपाण्डुषु (kurupāṇḍuṣu) - among the Kurus and Pāṇḍavas

(noun)

Locative, masculine, plural of kurupāṇḍu

kurupāṇḍu - Kurus and Pāṇḍavas

Compound type : dvandva (kuru+pāṇḍu)

• kuru – descendant of Kuru, a member of the Kuru dynasty
  proper noun (masculine)
• pāṇḍu – a descendant of Pāṇḍu, son of Pāṇḍu
  proper noun (masculine)