योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-76, verse-7

लोकार्णवपुरोद्गीर्णघनकोलाहलोल्वणम् ।
एतत्कुलाचलस्कन्धबद्धोग्ररवघर्घरम् ॥ ७ ॥

lokārṇavapurodgīrṇaghanakolāhalolvaṇam ,
etatkulācalaskandhabaddhograravaghargharam 7

7. lokārṇavapurodgīrṇaghanakolāhalolvaṇam
etatkulācalaskandhabaddhograravaghargharam

7. lokārṇavapurodgīrṇaghanakolāhalolvaṇam
etatkulācalaskandhabaddhograravaghargharam

7. It was intense, filled with a dense tumult that erupted from the forefront of the cosmic ocean (lokārṇava). Its terrible, rumbling sound was bound to the slopes of these great, primordial mountains.

Words meanings summery:

• लोकार्णवपुरोद्गीर्णघनकोलाहलोल्वणम् (lokārṇavapurodgīrṇaghanakolāhalolvaṇam) - describing a terrifying sound or phenomenon of immense scale during a cosmic dissolution (intense with dense tumult, emitted from the front of the ocean of worlds)

• एतत्कुलाचलस्कन्धबद्धोग्ररवघर्घरम् (etatkulācalaskandhabaddhograravaghargharam) - describing a terrifying sound or phenomenon whose origin or connection is to primordial mountains (with a terrible, rumbling sound bound to the slopes of these ancestral mountains)

Words meanings and morphology

लोकार्णवपुरोद्गीर्णघनकोलाहलोल्वणम् (lokārṇavapurodgīrṇaghanakolāhalolvaṇam) - describing a terrifying sound or phenomenon of immense scale during a cosmic dissolution (intense with dense tumult, emitted from the front of the ocean of worlds)

(adjective)

Accusative, neuter, singular of lokārṇavapurodgīrṇaghanakolāhalolvaṇa

lokārṇavapurodgīrṇaghanakolāhalolvaṇa - intense with dense tumult, emitted from the front of the ocean of worlds

Compound type : Bahuvrīhi (loka+arṇava+pura+udgīrṇa+ghana+kolāhala+ulvaṇa)

• loka – world, realm, people
  noun (masculine)
  Root: lok (class 1)
• arṇava – ocean, sea
  noun (masculine)
  From root ṛ (to go) or ṛṇu (to move).
• pura – front, presence, city, fortress
  noun/indeclinable (neuter)
• udgīrṇa – vomited forth, emitted, expressed
  adjective
  Past Passive Participle
  Derived from root gṛ (to swallow, to utter) with prefix ud (up, forth).
  Prefix: ud
  Root: gṛ (class 6)
• ghana – dense, thick, solid, cloud
  adjective/noun (masculine/neuter)
• kolāhala – tumult, great noise, uproar, clamor
  noun (masculine)
• ulvaṇa – intense, formidable, terrible, fierce, abundant, mighty
  adjective

Note: A compound adjective, modifying an implied neuter singular noun in the accusative case (likely the subject of the entire description).

एतत्कुलाचलस्कन्धबद्धोग्ररवघर्घरम् (etatkulācalaskandhabaddhograravaghargharam) - describing a terrifying sound or phenomenon whose origin or connection is to primordial mountains (with a terrible, rumbling sound bound to the slopes of these ancestral mountains)

(adjective)

Accusative, neuter, singular of etatkulācalaskandhabaddhograravagharghara

etatkulācalaskandhabaddhograravagharghara - with a terrible, rumbling sound bound to the slopes of these ancestral mountains

Compound type : Bahuvrīhi (etad+kula+acala+skandha+baddha+ugra+rava+gharghara)

• etad – this, these
  pronoun
• kula – family, lineage, race, ancestral
  noun (neuter)
• acala – mountain, immovable
  noun/adjective (masculine)
  From a (not) + cala (moving).
• skandha – shoulder, trunk of a tree, part, section, slope (of a mountain)
  noun (masculine)
• baddha – bound, tied, fixed, connected, fettered
  adjective
  Past Passive Participle
  Derived from root bandh (to bind).
  Root: bandh (class 9)
• ugra – terrible, fierce, violent, formidable, mighty
  adjective
• rava – sound, roar, cry, noise
  noun (masculine)
  From root ru (to sound, roar).
  Root: ru (class 2)
• gharghara – rumbling, gurgling sound, grumbling
  noun/adjective (masculine/neuter)
  Onomatopoeic.

Note: A compound adjective, modifying an implied neuter singular noun in the accusative case.