योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-85, verse-22

लोकालोकाद्रिरसनारणदर्णवघुंघुमा ।
तमःखण्डेन्द्रनीलाभा निजरत्नविराजिता ॥ २२ ॥

lokālokādrirasanāraṇadarṇavaghuṃghumā ,
tamaḥkhaṇḍendranīlābhā nijaratnavirājitā 22

22. lokāloka-adri-rasana-araṇad-arṇava-ghuṃghumā
tamaḥ-khaṇḍa-indranīlābhā nija-ratna-virājitā

22. (rātriḥ / sā) lokāloka-adri-rasana-araṇad-arṇava-ghuṃghumā,
tamaḥ-khaṇḍa-indranīlābhā,
nija-ratna-virājitā (āsīt).

22. (The darkness) was like the Lokāloka mountain, having the roaring murmur of the oceans as its girdle. It had the luster of a mass of sapphire (indranīla) and was adorned with its own jewels.

Words meanings summery:

• लोकालोक-अद्रि-रसन-अरणद्-अर्णव-घुंघुमा (lokāloka-adri-rasana-araṇad-arṇava-ghuṁghumā) - (The darkness/night) described as resembling the Lokāloka mountain, encircled by the sound of roaring oceans. (having the roaring murmur of oceans as its girdle around the Lokāloka mountain)

• तमः-खण्ड-इन्द्रनीलाभा (tamaḥ-khaṇḍa-indranīlābhā) - Described as having the dark blue sheen of a sapphire chunk. (having the luster of a piece of sapphire-like darkness, resembling a mass of sapphire)

• निज-रत्न-विराजिता (nija-ratna-virājitā) - The night/darkness sparkling with its own stars. (adorned with its own jewels)

Words meanings and morphology

लोकालोक-अद्रि-रसन-अरणद्-अर्णव-घुंघुमा (lokāloka-adri-rasana-araṇad-arṇava-ghuṁghumā) - (The darkness/night) described as resembling the Lokāloka mountain, encircled by the sound of roaring oceans. (having the roaring murmur of oceans as its girdle around the Lokāloka mountain)

(adjective)

Nominative, feminine, singular of lokāloka-adri-rasana-araṇad-arṇava-ghuṃghumā

lokāloka-adri-rasana-araṇad-arṇava-ghuṁghumā - one whose girdle is the roaring murmur of the ocean, around the Lokāloka mountain

Bahuvrihi compound, describing the night/darkness.

Compound type : bahuvrihi (lokāloka+adri+rasana+araṇat+arṇava+ghuṃghumā)

• lokāloka – Lokāloka mountain (mythical mountain separating the visible world from the region of darkness)
  proper noun (masculine)
• adri – mountain, rock
  noun (masculine)
• rasana – girdle, belt, tongue
  noun (feminine)
• araṇat – roaring, sounding, making noise
  adjective (masculine)
  Present Active Participle
  From root 'raṇ'
  Root: raṇ (class 1)
• arṇava – ocean, sea
  noun (masculine)
• ghuṃghumā – murmur, humming sound, rumbling sound
  noun (feminine)

Note: Modifies the implied subject, 'rātri' (night) or 'tamaḥ' (darkness) taking feminine adjective.

तमः-खण्ड-इन्द्रनीलाभा (tamaḥ-khaṇḍa-indranīlābhā) - Described as having the dark blue sheen of a sapphire chunk. (having the luster of a piece of sapphire-like darkness, resembling a mass of sapphire)

(adjective)

Nominative, feminine, singular of tamaḥ-khaṇḍa-indranīlābhā

tamaḥ-khaṇḍa-indranīlābhā - resembling a piece of dark sapphire

Tatpurusha compound

Compound type : tatpurusha (tamas+khaṇḍa+indranīla+ābhā)

• tamas – darkness, gloom
  noun (neuter)
• khaṇḍa – piece, fragment, mass
  noun (masculine)
• indranīla – sapphire
  noun (masculine)
  Tatpurusha compound: 'indra' (best/chief) + 'nīla' (blue)
• ābhā – luster, brilliance, resemblance, color
  noun (feminine)

Note: Modifies the implied subject.

निज-रत्न-विराजिता (nija-ratna-virājitā) - The night/darkness sparkling with its own stars. (adorned with its own jewels)

(adjective)

Nominative, feminine, singular of nija-ratna-virājitā

nija-ratna-virājitā - adorned with its own jewels

Tatpurusha compound

Compound type : tatpurusha (nija+ratna+virājita)

• nija – one's own, innate, native
  adjective (feminine)
• ratna – jewel, gem, treasure
  noun (neuter)
• virājita – shining, splendid, adorned
  adjective (feminine)
  Past Passive Participle
  From root 'rāj' with upasarga 'vi'
  Prefix: vi
  Root: rāj (class 1)

Note: Modifies the implied subject.