महाभारतः mahābhārataḥ - book-1, chapter-125, verse-6

ततो रङ्गाङ्गणगतो द्रोणो वचनमब्रवीत् ।
निवार्य वादित्रगणं महामेघनिभस्वनम् ॥६॥

6. tato raṅgāṅgaṇagato droṇo vacanamabravīt ,
nivārya vāditragaṇaṁ mahāmeghanibhasvanam.

6. tataḥ raṅgāṅgaṇagataḥ droṇaḥ vacanam abravīt
nivārya vāditragaṇam mahāmeghanibhasvanam

6. Then Droṇa, having entered the arena, spoke, silencing the ensemble of musical instruments that roared like a great cloud.

Words meanings summery:

• ततः (tataḥ) - then, from that, therefore

• रङ्गाङ्गणगतः (raṅgāṅgaṇagataḥ) - one who has gone to the arena, having entered the stage area

• द्रोणः (droṇaḥ) - Droṇa (name of a preceptor)

• वचनम् (vacanam) - word, speech, command

• अब्रवीत् (abravīt) - he spoke, he said

• निवार्य (nivārya) - having stopped, having silenced, having prevented

• वादित्रगणम् (vāditragaṇam) - ensemble of musical instruments

• महामेघनिभस्वनम् (mahāmeghanibhasvanam) - having a sound like a great cloud, roaring like a great cloud

Words meanings and morphology

ततः (tataḥ) - then, from that, therefore

(indeclinable)

रङ्गाङ्गणगतः (raṅgāṅgaṇagataḥ) - one who has gone to the arena, having entered the stage area

(adjective)

Nominative, masculine, singular of raṅgāṅgaṇagata

raṅgāṅgaṇagata - gone to the arena/stage

Compound type : tatpuruṣa (raṅgāṅgaṇa+gata)

• raṅgāṅgaṇa – an arena, a stage area, an open ground for public spectacle
  noun (neuter)
• gata – gone, reached, obtained
  adjective
  Past Passive Participle
  derived from root gam (to go)
  Root: gam (class 1)

द्रोणः (droṇaḥ) - Droṇa (name of a preceptor)

(proper noun)

Nominative, masculine, singular of droṇa

droṇa - Droṇa (a proper name, preceptor of the Pāṇḍavas and Kauravas)

वचनम् (vacanam) - word, speech, command

(noun)

Accusative, neuter, singular of vacana

vacana - word, speech, saying, command

Root: vac (class 2)

अब्रवीत् (abravīt) - he spoke, he said

(verb)

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

Imperfect past 3rd person singular active

Root: brū (class 2)

निवार्य (nivārya) - having stopped, having silenced, having prevented

(indeclinable)

Absolutive (gerund)

formed with prefix ni + root vṛ

Prefix: ni

Root: vṛ (class 10)

वादित्रगणम् (vāditragaṇam) - ensemble of musical instruments

(noun)

Accusative, masculine, singular of vāditragaṇa

vāditragaṇa - group of musical instruments, orchestra

Compound type : tatpuruṣa (vāditra+gaṇa)

• vāditra – musical instrument
  noun (neuter)
  from root vad (to sound, to play an instrument)
  Root: vad (class 1)
• gaṇa – group, assembly, multitude, troop
  noun (masculine)

महामेघनिभस्वनम् (mahāmeghanibhasvanam) - having a sound like a great cloud, roaring like a great cloud

(adjective)

Accusative, masculine, singular of mahāmeghanibhasvana

mahāmeghanibhasvana - having a sound resembling a great cloud

Compound type : bahuvrīhi (mahāmeghanibha+svana)

• mahāmeghanibha – resembling a great cloud
  adjective
• svana – sound, noise, roar
  noun (masculine)
  Root: svan (class 1)