महाभारतः mahābhārataḥ - book-7, chapter-171, verse-12

न्यस्तशस्त्रौ ततस्तौ तु नादहदस्त्रजोऽनलः ।
वारुणास्त्रप्रयोगाच्च वीर्यवत्त्वाच्च कृष्णयोः ॥१२॥

12. nyastaśastrau tatastau tu nādahadastrajo'nalaḥ ,
vāruṇāstraprayogācca vīryavattvācca kṛṣṇayoḥ.

12. nyastaśastrau tataḥ tau tu na adahat astrajaḥ analaḥ
vāruṇāstraprayogāt ca vīryavattvāt ca kṛṣṇayoḥ

12. tataḥ tu nyastaśastrau tau astrajaḥ analaḥ na adahat
vāruṇāstraprayogāt ca kṛṣṇayoḥ vīryavattvāt ca

12. Then, even though those two (Arjuna and Kṛṣṇa) had laid down their weapons, the fire generated by the (Aśvatthāman's) weapon did not burn them. This was due to the use of the Varuṇa weapon and the inherent strength of the two Kṛṣṇas.

Words meanings summery:

• न्यस्तशस्त्रौ (nyastaśastrau) - having laid down weapons

• ततः (tataḥ) - then, thereafter

• तौ (tau) - Arjuna and Kṛṣṇa (those two)

• तु (tu) - but, indeed, however

• न (na) - not

• अदहत् (adahat) - did not burn

• अस्त्रजः (astrajaḥ) - born from the weapon

• अनलः (analaḥ) - fire

• वारुणास्त्रप्रयोगात् (vāruṇāstraprayogāt) - due to the deployment of the Varuṇa weapon

• च (ca) - and

• वीर्यवत्त्वात् (vīryavattvāt) - due to strength, due to power

• च (ca) - and

• कृष्णयोः (kṛṣṇayoḥ) - of Arjuna and Kṛṣṇa (Vāsudeva) (of the two Kṛṣṇas)

Words meanings and morphology

न्यस्तशस्त्रौ (nyastaśastrau) - having laid down weapons

(adjective)

Nominative, masculine, dual of nyastaśastra

nyastaśastra - one who has laid down weapons, disarmed

Compound type : bahuvrihi (nyasta+śastra)

• nyasta – placed, thrown down, deposited
  adjective
  Past Passive Participle
  Derived from root as (4th class) with prefix ni- and P.P.P. suffix -ta
  Prefix: ni
  Root: as (class 4)
• śastra – weapon, arm, knife
  noun (neuter)

ततः (tataḥ) - then, thereafter

(indeclinable)

तौ (tau) - Arjuna and Kṛṣṇa (those two)

(pronoun)

Nominative, masculine, dual of tad

tad - that, this, he, she, it

तु (tu) - but, indeed, however

(indeclinable)

न (na) - not

(indeclinable)

अदहत् (adahat) - did not burn

(verb)

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

Root: dah (class 1)

अस्त्रजः (astrajaḥ) - born from the weapon

(adjective)

Nominative, masculine, singular of astraja

astraja - born from a weapon, weapon-born

Compound type : tatpurusha (astra+ja)

• astra – missile, weapon
  noun (neuter)
• ja – born, produced from
  adjective
  Agentive suffix
  Derived from root jan (4th class) with agentive suffix -a
  Root: jan (class 4)

अनलः (analaḥ) - fire

(noun)

Nominative, masculine, singular of anala

anala - fire, Agni (god of fire)

वारुणास्त्रप्रयोगात् (vāruṇāstraprayogāt) - due to the deployment of the Varuṇa weapon

(noun)

Ablative, masculine, singular of vāruṇāstraprayoga

vāruṇāstraprayoga - application/deployment of the Varuṇa missile

Compound type : tatpurusha (vāruṇāstra+prayoga)

• vāruṇāstra – weapon of Varuṇa, Varuṇa missile
  noun (neuter)
• prayoga – application, use, deployment
  noun (masculine)
  Derived from root yuj (7th class) with prefix pra- and suffix -a
  Prefix: pra
  Root: yuj (class 7)

च (ca) - and

(indeclinable)

वीर्यवत्त्वात् (vīryavattvāt) - due to strength, due to power

(noun)

Ablative, neuter, singular of vīryavattva

vīryavattva - condition of being powerful, valor, strength, heroism

Abstract noun derived from vīryavat (powerful) with suffix -tva

च (ca) - and

(indeclinable)

कृष्णयोः (kṛṣṇayoḥ) - of Arjuna and Kṛṣṇa (Vāsudeva) (of the two Kṛṣṇas)

(proper noun)

Genitive, masculine, dual of kṛṣṇa

kṛṣṇa - dark, black; Kṛṣṇa (Vāsudeva); Arjuna (also called Kṛṣṇa)