योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-134, verse-28

भूतसंघट्टविश्लेषवशाद्भीषणनिःस्वनम् ।
हिमवद्विन्ध्यशैलाद्रिप्रमाणास्थ्यचलावृतम् ॥ २८ ॥

bhūtasaṃghaṭṭaviśleṣavaśādbhīṣaṇaniḥsvanam ,
himavadvindhyaśailādripramāṇāsthyacalāvṛtam 28

28. bhūtasaṅghaṭṭaviśleṣavaśāt bhīṣaṇaniḥsvanam
himavadvindhyaśailādripramāṇāsthyacalāvṛtam

28. bhūtasaṅghaṭṭaviśleṣavaśāt bhīṣaṇaniḥsvanam
himavadvindhyaśailādripramāṇāsthyacalāvṛtam

28. The scene emitted a terrifying roar caused by the crashing and dismemberment of beings, and was covered with immovable bones as vast as the Himālaya and Vindhya mountains.

Words meanings summery:

• भूतसङ्घट्टविश्लेषवशात् (bhūtasaṅghaṭṭaviśleṣavaśāt) - due to the collision and separation of beings/elements

• भीषणनिःस्वनम् (bhīṣaṇaniḥsvanam) - a terrifying sound/roar

• हिमवद्विन्ध्यशैलाद्रिप्रमाणास्थ्यचलावृतम् (himavadvindhyaśailādripramāṇāsthyacalāvṛtam) - covered with immovable bones the size of Himālaya and Vindhya mountains

Words meanings and morphology

भूतसङ्घट्टविश्लेषवशात् (bhūtasaṅghaṭṭaviśleṣavaśāt) - due to the collision and separation of beings/elements

(noun)

Ablative, masculine, singular of bhūtasaṅghaṭṭaviśleṣavaśa

bhūtasaṅghaṭṭaviśleṣavaśa - the state or condition of being caused by the collision and separation of beings/elements

Compound type : tatpuruṣa (bhūta+saṅghaṭṭa+viśleṣa+vaśa)

• bhūta – being, creature, element, ghost; happened, past
  noun (neuter)
  Past Passive Participle
  Derived from root bhū (to be, to become)
  Root: bhū (class 1)
• saṅghaṭṭa – collision, clashing, impact, friction
  noun (masculine)
  Prefix: sam
  Root: ghaṭṭ (class 10)
• viśleṣa – separation, disjoining, analysis, decomposition
  noun (masculine)
  Prefix: vi
  Root: śliṣ (class 4)
• vaśa – will, power, control, subjection; cause, reason
  noun (masculine)

भीषणनिःस्वनम् (bhīṣaṇaniḥsvanam) - a terrifying sound/roar

(noun)

neuter, singular of bhīṣaṇaniḥsvana

bhīṣaṇaniḥsvana - a terrifying sound or roar

Compound type : karmadhāraya (bhīṣaṇa+niḥsvana)

• bhīṣaṇa – terrifying, dreadful, formidable
  adjective (neuter)
  Derived from root bhī (to fear)
  Root: bhī (class 3)
• niḥsvana – sound, noise, roar
  noun (neuter)
  Prefix: nis
  Root: svan (class 1)

हिमवद्विन्ध्यशैलाद्रिप्रमाणास्थ्यचलावृतम् (himavadvindhyaśailādripramāṇāsthyacalāvṛtam) - covered with immovable bones the size of Himālaya and Vindhya mountains

(adjective)

neuter, singular of himavadvindhyaśailādripramāṇāsthyacalāvṛta

himavadvindhyaśailādripramāṇāsthyacalāvṛta - covered by immovable bones, which are of the measure of the Himālaya and Vindhya mountains

Compound type : bahuvrīhi (himavat+vindhya+śaila+adri+pramāṇa+asthi+acala+āvṛta)

• himavat – the Himālaya mountains
  proper noun (masculine)
• vindhya – the Vindhya mountain range
  proper noun (masculine)
• śaila – mountain, rock, hill
  noun (masculine)
• adri – mountain, rock
  noun (masculine)
• pramāṇa – measure, size, dimension, standard
  noun (neuter)
  Prefix: pra
  Root: mā (class 2)
• asthi – bone
  noun (neuter)
• acala – immovable; a mountain
  noun (masculine)
  Negation of cala (moving)
  Prefix: a
  Root: cal (class 1)
• āvṛta – covered, enveloped, surrounded
  adjective (neuter)
  Past Passive Participle
  Derived from root vṛ (to cover) with prefix ā
  Prefix: ā
  Root: vṛ (class 5)