महाभारतः mahābhārataḥ - book-7, chapter-16, verse-49

ततोऽन्योन्येन ते सेने समाजग्मतुरोजसा ।
गङ्गासरय्वोर्वेगेन प्रावृषीवोल्बणोदके ॥४९॥

49. tato'nyonyena te sene samājagmaturojasā ,
gaṅgāsarayvorvegena prāvṛṣīvolbaṇodake.

49. tataḥ anyonyena te sene samājagmatuḥ ojasā
gaṅgā-sarayvoh vegena prāvṛṣi iva ulbaṇa-udake

49. tataḥ te sene anyonyena ojasā samājagmatuḥ,
prāvṛṣi gaṅgā-sarayvoh ulbaṇa-udake vegena iva (samājagmatuḥ)

49. Then those two armies clashed with each other with great vigor, just as the powerfully surging waters of the Gaṅgā and Sarayū rivers meet during the rainy season.

Words meanings summery:

• ततः (tataḥ) - then, thereupon, from there

• अन्योन्येन (anyonyena) - with each other, mutually

• ते (te) - those (two)

• सेने (sene) - armies (two)

• समाजग्मतुः (samājagmatuḥ) - they (two) met, they clashed

• ओजसा (ojasā) - with vigor, with might, powerfully

• गङ्गा-सरय्वोह् (gaṅgā-sarayvoh) - of the Gaṅgā and Sarayū (rivers)

• वेगेन (vegena) - with force, with speed, by impetus

• प्रावृषि (prāvṛṣi) - in the rainy season

• इव (iva) - like, as, as if

• उल्बण-उदके (ulbaṇa-udake) - (like) abundant waters, surging waters

Words meanings and morphology

ततः (tataḥ) - then, thereupon, from there

(indeclinable)

अन्योन्येन (anyonyena) - with each other, mutually

(pronoun)

Instrumental, neuter, singular of anyonya

anyonya - each other, mutual, reciprocal

Compound of anya (other) + anya (other).

Note: Used adverbially to indicate reciprocal action.

ते (te) - those (two)

(pronoun)

Nominative, feminine, dual of tad

tad - that, those

Note: Agrees with 'sene'.

सेने (sene) - armies (two)

(noun)

Nominative, feminine, dual of senā

senā - army, host, forces

समाजग्मतुः (samājagmatuḥ) - they (two) met, they clashed

(verb)

3rd person , dual, active, perfect (liṭ) of sam-ā-gam

Perfect (Liṭ) 3rd person dual

From √gam ('to go') with prefixes sam ('together') and ā ('hither, towards').

Prefixes: sam+ā

Root: gam (class 1)

ओजसा (ojasā) - with vigor, with might, powerfully

(noun)

Instrumental, neuter, singular of ojas

ojas - vigor, strength, power, energy

गङ्गा-सरय्वोह् (gaṅgā-sarayvoh) - of the Gaṅgā and Sarayū (rivers)

(proper noun)

Genitive, feminine, dual of gaṅgā-sarayū

gaṅgā-sarayū - the Gaṅgā and Sarayū (names of two sacred rivers in India)

Dvandva compound of Gaṅgā and Sarayū.

Compound type : dvandva (gaṅgā+sarayū)

• gaṅgā – Ganges river (sacred river in India)
  proper noun (feminine)
• sarayū – Sarayū river (a river in India, important in Ramayana)
  proper noun (feminine)

वेगेन (vegena) - with force, with speed, by impetus

(noun)

Instrumental, masculine, singular of vega

vega - speed, velocity, force, impetus, current

प्रावृषि (prāvṛṣi) - in the rainy season

(noun)

Locative, feminine, singular of prāvṛṣ

prāvṛṣ - the rainy season, monsoon

इव (iva) - like, as, as if

(indeclinable)

उल्बण-उदके (ulbaṇa-udake) - (like) abundant waters, surging waters

(noun)

Nominative, neuter, dual of ulbaṇa-udaka

ulbaṇa-udaka - abundant water, surging water

Compound of ulbaṇa (abundant/surging) and udaka (water).

Compound type : karmadhāraya (ulbaṇa+udaka)

• ulbaṇa – abundant, excessive, violent, surging
  adjective (neuter)
• udaka – water
  noun (neuter)

Note: Implied subject in the simile, referring to the waters of the two rivers.