महाभारतः mahābhārataḥ - book-15, chapter-40, verse-6

ततः सुतुमुलः शब्दो जलान्तर्जनमेजय ।
प्रादुरासीद्यथा पूर्वं कुरुपाण्डवसेनयोः ॥६॥

6. tataḥ sutumulaḥ śabdo jalāntarjanamejaya ,
prādurāsīdyathā pūrvaṁ kurupāṇḍavasenayoḥ.

6. tataḥ su-tumulaḥ śabdaḥ jala-antar janamejaya
prādur āsīt yathā pūrvam kurupāṇḍavasenayoḥ

6. janamejaya tataḥ jala-antar su-tumulaḥ śabdaḥ
prādur āsīt yathā pūrvam kurupāṇḍavasenayoḥ

6. Then, O Janamejaya, a very tumultuous sound arose from within the water, just as it had previously occurred among the armies of the Kurus and Pāṇḍavas.

Words meanings summery:

• ततः (tataḥ) - then (then; thereafter; from that)

• सु-तुमुलः (su-tumulaḥ) - very tumultuous (very tumultuous; very loud)

• शब्दः (śabdaḥ) - sound (sound; noise; word)

• जल-अन्तर् (jala-antar) - from within the water (inside water; within water)

• जनमेजय (janamejaya) - O Janamejaya, the recipient of the narration (O Janamejaya (proper name))

• प्रादुर् (prādur) - forth; indicating appearance (manifestation; appearance; forth)

• आसीत् (āsīt) - arose; happened (was; existed; happened)

• यथा (yathā) - just as (as; just as; in which manner)

• पूर्वम् (pūrvam) - previously (before; previously; in the past)

• कुरुपाण्डवसेनयोः (kurupāṇḍavasenayoḥ) - among the armies of the Kurus and Pāṇḍavas (of the armies of the Kurus and Pāṇḍavas)

Words meanings and morphology

ततः (tataḥ) - then (then; thereafter; from that)

(indeclinable)

सु-तुमुलः (su-tumulaḥ) - very tumultuous (very tumultuous; very loud)

(adjective)

Nominative, masculine, singular of su-tumula

su-tumula - very tumultuous; very loud

Compound type : karmadhāraya (su+tumula)

• su – good; well; very; highly
  indeclinable
  Prefix indicating excellence or intensity.
• tumula – tumultuous; confused; loud; boisterous
  adjective (masculine)

शब्दः (śabdaḥ) - sound (sound; noise; word)

(noun)

Nominative, masculine, singular of śabda

śabda - sound; noise; word

Root: śabd (class 1)

जल-अन्तर् (jala-antar) - from within the water (inside water; within water)

(indeclinable)

locative compound / adverbial phrase

Compound type : avyayībhāva (jala+antar)

• jala – water
  noun (neuter)
• antar – inside; within; between
  indeclinable

Note: Adverbial usage.

जनमेजय (janamejaya) - O Janamejaya, the recipient of the narration (O Janamejaya (proper name))

(proper noun)

Vocative, masculine, singular of janamejaya

janamejaya - Janamejaya (a king, son of Parīkṣit)

compound - jana (people) + ejaya (causing to tremble/agitate) - one who agitates people.

Compound type : bahuvrīhi (jana+ejaya)

• jana – people; men; creatures
  noun (masculine)
  Root: jan (class 4)
• ejaya – agitating; causing to tremble
  adjective (masculine)
  causative derivative
  From root 'ej' (to tremble) in causative form 'ejaya' (to cause to tremble)
  Root: ej (class 1)

प्रादुर् (prādur) - forth; indicating appearance (manifestation; appearance; forth)

(indeclinable)

an adverbial prefix or indeclinable. Can be seen as prāduḥ.

आसीत् (āsīt) - arose; happened (was; existed; happened)

(verb)

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

Imperfect tense, 3rd person singular

Imperfect from root as

Root: as (class 2)

यथा (yathā) - just as (as; just as; in which manner)

(indeclinable)

पूर्वम् (pūrvam) - previously (before; previously; in the past)

(indeclinable)

When used adverbially, means 'formerly', 'previously'.

Note: Used adverbially.

कुरुपाण्डवसेनयोः (kurupāṇḍavasenayoḥ) - among the armies of the Kurus and Pāṇḍavas (of the armies of the Kurus and Pāṇḍavas)

(noun)

Genitive, feminine, dual of kurupāṇḍavasenā

kurupāṇḍavasenā - army of Kurus and Pāṇḍavas

dvandva compound of Kuru and Pāṇḍava, then tatpuruṣa with senā

Compound type : dvandva-tatpuruṣa (kuru+pāṇḍava+senā)

• kuru – Kuru (name of an ancient king and his descendants)
  proper noun (masculine)
• pāṇḍava – Pāṇḍava (descendant of Pāṇḍu)
  proper noun (masculine)
• senā – army; host; multitude
  noun (feminine)
  Root: sin (class 5)

Note: Refers to both armies. Genitive or Locative dual.