महाभारतः mahābhārataḥ - book-1, chapter-1, verse-123

यदाश्रौषं वासुदेवार्जुनौ तौ तथा धनुर्गाण्डिवमप्रमेयम् ।
त्रीण्युग्रवीर्याणि समागतानि तदा नाशंसे विजयाय संजय ॥१२३॥

123. yadāśrauṣaṁ vāsudevārjunau tau; tathā dhanurgāṇḍivamaprameyam ,
trīṇyugravīryāṇi samāgatāni; tadā nāśaṁse vijayāya saṁjaya.

123. yadā aśrauṣam vāsudevārjunau tau
tathā dhanuḥ gāṇḍīvam aprameyam
trīṇi ugravīryāṇi samāgatāni
tadā na āśaṃse vijayāya sañjaya

123. O Sañjaya, when I heard that those two, Vāsudeva and Arjuna, along with the incomparable bow Gāṇḍīva—these three mighty powers—had assembled, then I no longer hoped for victory.

Words meanings summery:

• यदा (yadā) - when, at which time

• अश्रौषम् (aśrauṣam) - I heard

• वासुदेवार्जुनौ (vāsudevārjunau) - Kṛṣṇa and Arjuna, the two principal heroes. (Vāsudeva and Arjuna)

• तौ (tau) - those two

• तथा (tathā) - and, thus, also

• धनुः (dhanuḥ) - bow

• गाण्डीवम् (gāṇḍīvam) - Gāṇḍīva (Arjuna's bow)

• अप्रमेयम् (aprameyam) - unrivaled in power or quality (immeasurable, incomparable)

• त्रीणि (trīṇi) - three

• उग्रवीर्याणि (ugravīryāṇi) - possessing formidable strength and courage (of fierce prowess, mighty powers)

• समागतानि (samāgatāni) - assembled, come together

• तदा (tadā) - then, at that time

• न (na) - not, no

• आशंसे (āśaṁse) - I hope, I expect

• विजयाय (vijayāya) - for victory

• सञ्जय (sañjaya) - O Sañjaya

Words meanings and morphology

यदा (yadā) - when, at which time

(indeclinable)

अश्रौषम् (aśrauṣam) - I heard

(verb)

1st person , singular, active, aorist (luṅ) of śru

Root: śru (class 5)

वासुदेवार्जुनौ (vāsudevārjunau) - Kṛṣṇa and Arjuna, the two principal heroes. (Vāsudeva and Arjuna)

(noun)

Nominative, masculine, dual of vāsudevārjuna

vāsudevārjuna - Vāsudeva and Arjuna

Compound type : dvandva (vāsudeva+arjuna)

• vāsudeva – son of Vasudeva; Kṛṣṇa
  noun (masculine)
  Patronymic from Vasudeva
• arjuna – Arjuna; white, clear
  noun (masculine)

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, he, she, it

तथा (tathā) - and, thus, also

(indeclinable)

धनुः (dhanuḥ) - bow

(noun)

Nominative, neuter, singular of dhanus

dhanus - bow, arc, rainbow

गाण्डीवम् (gāṇḍīvam) - Gāṇḍīva (Arjuna's bow)

(noun)

Nominative, neuter, singular of gāṇḍīva

gāṇḍīva - Arjuna's bow

अप्रमेयम् (aprameyam) - unrivaled in power or quality (immeasurable, incomparable)

(adjective)

Nominative, neuter, singular of aprameya

aprameya - immeasurable, incomprehensible, incomparable

Compound type : nañ-tatpuruṣa (a+prameya)

• a – not, un-
  prefix
• prameya – measurable, comprehensible, ascertainable
  adjective
  gerundive
  derived from pra-√mā (to measure)
  Prefix: pra
  Root: mā (class 2)

त्रीणि (trīṇi) - three

(numeral)

उग्रवीर्याणि (ugravīryāṇi) - possessing formidable strength and courage (of fierce prowess, mighty powers)

(adjective)

Nominative, neuter, plural of ugravīrya

ugravīrya - of fierce prowess, mighty, formidable

Compound type : bahuvrīhi (ugra+vīrya)

• ugra – fierce, terrible, mighty
  adjective
• vīrya – prowess, valor, strength, energy
  noun (neuter)

समागतानि (samāgatāni) - assembled, come together

(participle)

Nominative, neuter, plural of samāgata

samāgata - come together, assembled, arrived

past participle

derived from sam-ā-√gam

Prefixes: sam+ā

Root: gam (class 1)

तदा (tadā) - then, at that time

(indeclinable)

न (na) - not, no

(indeclinable)

आशंसे (āśaṁse) - I hope, I expect

(verb)

1st person , singular, ātmanepada, present (laṭ) of āśaṃs

Prefix: ā

Root: śaṃs (class 1)

विजयाय (vijayāya) - for victory

(noun)

Dative, masculine, singular of vijaya

vijaya - victory, triumph, conquest

action noun

derived from vi-√ji

Prefix: vi

Root: ji (class 1)

सञ्जय (sañjaya) - O Sañjaya

(noun)

Vocative, masculine, singular of sañjaya

sañjaya - Sañjaya (name of Dhṛtarāṣṭra's charioteer); victory, triumphant

derived from sam-√ji

Prefix: sam

Root: ji (class 1)