योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-8, verse-2

बृहत्पर्वतपर्वाढ्या ब्रह्माण्डत्वक्समावृता ।
देहयष्टिरियं यस्यास्त्रिलोकी लोककासिनी ॥ २ ॥

bṛhatparvataparvāḍhyā brahmāṇḍatvaksamāvṛtā ,
dehayaṣṭiriyaṃ yasyāstrilokī lokakāsinī 2

2. bṛhatparvataparvāḍhyā brahmāṇḍatvaksamāvṛtā
dehayastiḥ iyaṃ yasyāḥ trilokī lokakāsinī

2. yasyāḥ iyaṃ dehayastiḥ bṛhatparvataparvāḍhyā
brahmāṇḍatvaksamāvṛtā trilokī lokakāsinī

2. Whose slender body-stem is this, bedecked with many great mountains as joints, covered by the skin of the cosmic egg (brahmāṇḍa), and whose three worlds (trilokī) are world-illuminating?

Words meanings summery:

• बृहत्पर्वतपर्वाढ्या (bṛhatparvataparvāḍhyā) - adorned with great mountains as joints/sections

• ब्रह्माण्डत्वक्समावृता (brahmāṇḍatvaksamāvṛtā) - covered by the skin of the cosmic egg (brahmāṇḍa)

• देहयस्तिः (dehayastiḥ) - body-stem, slender body (like a stick or creeper)

• इयम् (iyam) - this, this here

• यस्याः (yasyāḥ) - whose, of which

• त्रिलोकी (trilokī) - the three worlds (heaven, earth, underworld)

• लोककासिनी (lokakāsinī) - world-illuminating, shining in the worlds

Words meanings and morphology

बृहत्पर्वतपर्वाढ्या (bṛhatparvataparvāḍhyā) - adorned with great mountains as joints/sections

(adjective)

Nominative, feminine, singular of bṛhatparvataparvāḍhya

bṛhatparvataparvāḍhya - having great mountains as its joints or sections

Compound type : bahuvrīhi (bṛhat+parvata+parvan+āḍhya)

• bṛhat – great, large, vast
  adjective (neuter)
• parvata – mountain, hill
  noun (masculine)
• parvan – joint, knot, section, limb
  noun (neuter)
• āḍhya – rich in, full of, endowed with, adorned with
  adjective (masculine)

Note: Feminine nominative singular, describing the body-stem (dehayastiḥ).

ब्रह्माण्डत्वक्समावृता (brahmāṇḍatvaksamāvṛtā) - covered by the skin of the cosmic egg (brahmāṇḍa)

(adjective)

Nominative, feminine, singular of brahmāṇḍatvaksamāvṛta

brahmāṇḍatvaksamāvṛta - covered entirely by the skin of the cosmic egg (brahmāṇḍa)

Compound type : bahuvrīhi (brahmāṇḍa+tvac+samāvṛta)

• brahmāṇḍa – cosmic egg, universe
  noun (neuter)
  From brahman (Brahman) + aṇḍa (egg).
• tvac – skin, hide, bark
  noun (feminine)
• samāvṛta – covered, surrounded, enveloped
  adjective (masculine)
  Past Passive Participle
  From root vṛ (to cover) with prefixes sam- and ā-.
  Prefixes: sam+ā
  Root: vṛ (class 5)

Note: Feminine nominative singular, describing the body-stem (dehayastiḥ).

देहयस्तिः (dehayastiḥ) - body-stem, slender body (like a stick or creeper)

(noun)

Nominative, feminine, singular of dehayasti

dehayasti - body-stem, slender body, creeper-like body

Compound type : tatpuruṣa (deha+yaṣṭi)

• deha – body
  noun (masculine)
• yaṣṭi – staff, stick, stalk, stem, slender body
  noun (feminine)

Note: The subject, referring to the creeper described in the previous verse.

इयम् (iyam) - this, this here

(pronoun)

Nominative, feminine, singular of idam

idam - this, this here

Note: Feminine nominative singular, agreeing with `dehayastiḥ`.

यस्याः (yasyāḥ) - whose, of which

(pronoun)

Genitive, feminine, singular of yad

yad - which, what, who

Note: Feminine genitive singular, referring to the creeper (latā) from the previous verse.

त्रिलोकी (trilokī) - the three worlds (heaven, earth, underworld)

(noun)

Nominative, feminine, singular of trilokī

trilokī - the three worlds (heaven, earth, and lower regions); the universe

Compound of tri (three) and loka (world).

Compound type : dvigu (tri+loka)

• tri – three
  numeral
• loka – world, realm, people
  noun (masculine)

Note: Nominative singular, referring to the three worlds as a collective.

लोककासिनी (lokakāsinī) - world-illuminating, shining in the worlds

(adjective)

Nominative, feminine, singular of lokakāsinī

lokakāsinī - illuminating the worlds, shining forth in the worlds

Agent noun (feminine)

From loka (world) + √kāś (to shine) with agent suffix -in. Feminine form.

Compound type : tatpuruṣa (loka+kāśin)

• loka – world, realm, people
  noun (masculine)
• kāśin – shining, appearing, manifesting
  adjective (masculine)
  Agent noun
  From root kāś (to shine).
  Root: kāś (class 1)

Note: Feminine nominative singular, describing `trilokī`.