योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-134, verse-31

अत्यन्तान्तर्हिताशेषसमस्ताचलमण्डलम् ।
रक्तप्रभाभ्रसंभारवस्त्रावृतदिगङ्गनम् ॥ ३१ ॥

atyantāntarhitāśeṣasamastācalamaṇḍalam ,
raktaprabhābhrasaṃbhāravastrāvṛtadigaṅganam 31

31. atyantāntarhitāśeṣasamastācalamaṇḍalam
raktaprabhābhrasaṃbhāravastrāvṛtadiganganam

31. atyantāntarhitāśeṣasamastācalamaṇḍalam
raktaprabhābhrasaṃbhāravastrāvṛtadiganganam

31. Where the entire host of all mountains was completely submerged, and the maidens of the directions (horizons) were veiled in garments of cloud masses, radiant like blood.

Words meanings summery:

• अत्यन्तान्तर्हिताशेषसमस्ताचलमण्डलम् (atyantāntarhitāśeṣasamastācalamaṇḍalam) - where the entire host of all mountains was completely hidden/submerged

• रक्तप्रभाभ्रसंभारवस्त्रावृतदिगन्गनम् (raktaprabhābhrasaṁbhāravastrāvṛtadiganganam) - the maidens of the directions (horizons) covered by garments of masses of clouds shining like blood

Words meanings and morphology

अत्यन्तान्तर्हिताशेषसमस्ताचलमण्डलम् (atyantāntarhitāśeṣasamastācalamaṇḍalam) - where the entire host of all mountains was completely hidden/submerged

(adjective)

neuter, singular of atyantāntarhitāśeṣasamastācalamaṇḍala

atyantāntarhitāśeṣasamastācalamaṇḍala - where the multitude (maṇḍala) of all (aśeṣa, samasta) mountains (acala) was completely (atyanta) hidden (antarhita)

Compound type : bahuvrīhi (atyanta+antarhita+aśeṣa+samasta+acala+maṇḍala)

• atyanta – excessive, extreme; completely, entirely
  indeclinable
  Prefix: ati
  Root: ant (class 1)
• antarhita – hidden, concealed, disappeared
  adjective (neuter)
  Past Passive Participle
  Derived from root dhā (to place) with prefix antar
  Prefix: antar
  Root: dhā (class 3)
• aśeṣa – all, entire, complete, without remainder
  adjective (neuter)
  Negation of śeṣa (remainder)
  Prefix: a
• samasta – all, whole, entire, collected
  adjective (neuter)
  Past Passive Participle
  Derived from root as (to be) with prefix sam
  Prefix: sam
  Root: as (class 2)
• acala – immovable; a mountain
  noun (masculine)
  Negation of cala (moving)
  Prefix: a
  Root: cal (class 1)
• maṇḍala – circle, disc, region, multitude, host
  noun (neuter)

रक्तप्रभाभ्रसंभारवस्त्रावृतदिगन्गनम् (raktaprabhābhrasaṁbhāravastrāvṛtadiganganam) - the maidens of the directions (horizons) covered by garments of masses of clouds shining like blood

(adjective)

neuter, singular of raktaprabhābhrasaṃbhāravastrāvṛtadigangana

raktaprabhābhrasaṁbhāravastrāvṛtadigangana - the maidens of the directions (dikaṅganā) covered (āvṛta) by garments (vastra) of masses (saṃbhāra) of clouds (abhra) with the radiance (prabhā) of blood (rakta)

Compound type : bahuvrīhi (rakta+prabhā+abhra+saṃbhāra+vastra+āvṛta+dikaṅganā)

• rakta – blood; red, colored
  noun (neuter)
  Past Passive Participle
  Derived from root rañj (to color)
  Root: rañj (class 1)
• prabhā – light, radiance, splendor, lustre
  noun (feminine)
  Prefix: pra
  Root: bhā (class 2)
• abhra – cloud, sky
  noun (neuter)
• saṃbhāra – collection, heap, mass, abundance, material
  noun (masculine)
  Prefix: sam
  Root: bhṛ (class 1)
• vastra – garment, cloth, dress
  noun (neuter)
• āvṛta – covered, enveloped, surrounded
  adjective (neuter)
  Past Passive Participle
  Derived from root vṛ (to cover) with prefix ā
  Prefix: ā
  Root: vṛ (class 5)
• dikaṅganā – maiden of the direction, horizon (personified)
  noun (feminine)