योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-24, verse-17

त्रैलोक्यवरभूतौघसंचाराविरलान्तरम् ।
अन्योन्यादृष्टसंचारसुरासुरकुलाकुलम् ॥ १७ ॥

trailokyavarabhūtaughasaṃcārāviralāntaram ,
anyonyādṛṣṭasaṃcārasurāsurakulākulam 17

17. trailokyavarabhūtaughasañcārāviralāntaram
anyonyādṛṣṭasañcārasurāsurakulākulam

17. trailokyavarabhūtaughasañcārāviralāntaram
anyonyādṛṣṭasañcārasurāsurakulākulam

17. Its spaces are densely filled by the movements of the most excellent hosts of beings from the three worlds, and it is crowded with multitudes of gods and demons who move without perceiving each other.

Words meanings summery:

• त्रैलोक्यवरभूतौघसञ्चाराविरलान्तरम् (trailokyavarabhūtaughasañcārāviralāntaram) - a place whose spaces are densely filled by the movements of the most excellent hosts of beings from the three worlds (whose interior is densely filled by the movements of the best hosts of beings from the three worlds)

• अन्योन्यादृष्टसञ्चारसुरासुरकुलाकुलम् (anyonyādṛṣṭasañcārasurāsurakulākulam) - a place crowded with multitudes of gods and demons who move without perceiving each other (crowded with multitudes of gods and demons whose movements are mutually unseen)

Words meanings and morphology

त्रैलोक्यवरभूतौघसञ्चाराविरलान्तरम् (trailokyavarabhūtaughasañcārāviralāntaram) - a place whose spaces are densely filled by the movements of the most excellent hosts of beings from the three worlds (whose interior is densely filled by the movements of the best hosts of beings from the three worlds)

(adjective)

Accusative, neuter, singular of trailokyavarabhūtaughasañcārāviralāntara

trailokyavarabhūtaughasañcārāviralāntara - characterized by continuous movement within its spaces of the best beings from the three worlds

Compound type : Bahuvrīhi (trailokya+vara+bhūtaogha+sañcāra+avirala+antara)

• trailokya – the three worlds (heaven, earth, and netherworld)
  noun (neuter)
• vara – best, excellent, principal, chief
  adjective (masculine)
• bhūtaogha – host of beings, multitude of creatures
  noun (masculine)
• sañcāra – movement, passing through, roaming, circulation
  noun (masculine)
  Derived from root 'car' with prefix 'sam'
  Prefix: sam
  Root: car (class 1)
• avirala – not sparse, dense, continuous, uninterrupted
  adjective (neuter)
  Formed with negative prefix 'a-' and 'virala'
  Prefix: a
• antara – interval, space, interior, inner part
  noun (neuter)

Note: Accusative singular neuter, modifying an implied noun like 'sthānam'.

अन्योन्यादृष्टसञ्चारसुरासुरकुलाकुलम् (anyonyādṛṣṭasañcārasurāsurakulākulam) - a place crowded with multitudes of gods and demons who move without perceiving each other (crowded with multitudes of gods and demons whose movements are mutually unseen)

(adjective)

Accusative, neuter, singular of anyonyādṛṣṭasañcārasurāsurakulākula

anyonyādṛṣṭasañcārasurāsurakulākula - characterized by being crowded with multitudes of gods and demons whose movements are mutually unseen

Compound type : Bahuvrīhi (anyonyā+adṛṣṭa+sañcāra+sura+asura+kula+ākula)

• anyonyā – mutually, reciprocally, one another
  indeclinable
• adṛṣṭa – unseen, unperceived, invisible
  adjective (neuter)
  Past Passive Participle
  From root 'dṛś' (to see) with negative prefix 'a-'
  Prefix: a
  Root: dṛś (class 1)
• sañcāra – movement, passing through, roaming, circulation
  noun (masculine)
  Derived from root 'car' with prefix 'sam'
  Prefix: sam
  Root: car (class 1)
• sura – god, deity
  noun (masculine)
• asura – demon, titan, anti-god
  noun (masculine)
  Prefix: a
• kula – multitude, host, race, family, tribe
  noun (neuter)
• ākula – crowded, filled, agitated, perplexed
  adjective (neuter)
  Prefix: ā

Note: Accusative singular neuter, modifying an implied noun like 'sthānam'.