योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-73, verse-35

विवेशाकाशगृध्रस्य हृदयं तरुणस्य सा ।
प्राणमारुतमार्गेण खं खगीव बिलेशया ॥ ३५ ॥

viveśākāśagṛdhrasya hṛdayaṃ taruṇasya sā ,
prāṇamārutamārgeṇa khaṃ khagīva bileśayā 35

35. viveśa ākāśagṛdhrasya hṛdayam taruṇasya sā
prāṇamārutamārgeṇa kham khagī iva bileśayā

35. sā taruṇasya ākāśagṛdhrasya hṛdayam
prāṇamārutamārgeṇa kham bileśayā khagī iva viveśa

35. She entered the heart of the young sky-vulture, using the pathway of his vital breath (prāṇa-māruta), just as a female bird (khagī) residing in a nest (bileśayā) flies up into the sky.

Words meanings summery:

• विवेश (viveśa) - she entered (she entered, it entered)

• आकाशगृध्रस्य (ākāśagṛdhrasya) - of the sky-vulture

• हृदयम् (hṛdayam) - heart (heart, core, mind)

• तरुणस्य (taruṇasya) - of the young (of the young, of the fresh)

• सा (sā) - she (the female spirit/entity) (she, that (fem))

• प्राणमारुतमार्गेण (prāṇamārutamārgeṇa) - by the path of vital breath (prāṇa) (by the path of vital breath/wind)

• खम् (kham) - sky (sky, space)

• खगी (khagī) - female bird

• इव (iva) - just as (like, as, as if)

• बिलेशया (bileśayā) - residing in a nest (dwelling in a hole, from a hole, nest-dweller)

Words meanings and morphology

विवेश (viveśa) - she entered (she entered, it entered)

(verb)

3rd person , singular, active, past perfect (liṭ) of vi√viś

Perfect Indicative

3rd person singular, Parasmaipada, perfect tense of √viś with prefix vi-

Prefix: vi

Root: viś (class 6)

आकाशगृध्रस्य (ākāśagṛdhrasya) - of the sky-vulture

(noun)

Genitive, masculine, singular of ākāśagṛdhra

ākāśagṛdhra - sky-vulture

Compound type : tatpurusha (ākāśa+gṛdhra)

• ākāśa – sky, space, ether
  noun (masculine)
• gṛdhra – vulture, greedy
  noun (masculine)

हृदयम् (hṛdayam) - heart (heart, core, mind)

(noun)

Accusative, neuter, singular of hṛdaya

hṛdaya - heart, mind, core

तरुणस्य (taruṇasya) - of the young (of the young, of the fresh)

(adjective)

Genitive, masculine, singular of taruṇa

taruṇa - young, fresh, new

Note: Agrees with ākāśagṛdhrasya.

सा (sā) - she (the female spirit/entity) (she, that (fem))

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, he, it

प्राणमारुतमार्गेण (prāṇamārutamārgeṇa) - by the path of vital breath (prāṇa) (by the path of vital breath/wind)

(noun)

Instrumental, masculine, singular of prāṇamārutamārga

prāṇamārutamārga - path of vital breath/wind

Compound type : tatpurusha (prāṇa+māruta+mārga)

• prāṇa – vital breath, life-force
  noun (masculine)
• māruta – wind, air, breath
  noun (masculine)
• mārga – path, way, road
  noun (masculine)

खम् (kham) - sky (sky, space)

(noun)

Accusative, neuter, singular of kha

kha - sky, space, ether, hole

Note: Object of implied verb in simile 'enters/flies into'.

खगी (khagī) - female bird

(noun)

Nominative, feminine, singular of khagī

khagī - female bird

feminine form of khaga

इव (iva) - just as (like, as, as if)

(indeclinable)

Note: Particle of comparison.

बिलेशया (bileśayā) - residing in a nest (dwelling in a hole, from a hole, nest-dweller)

(adjective)

Ablative, feminine, singular of bileśaya

bileśaya - dwelling in a hole/cavity/nest

From bila (hole) + √śī (to lie, dwell) + a

Compound type : tatpurusha (bila+śaya)

• bila – hole, cavity, nest
  noun (neuter)
• śaya – lying, dwelling, resting
  adjective (masculine)
  agent noun/adjective
  from √śī (to lie, dwell)
  Root: śī (class 2)

Note: Feminine ablative singular, suggesting 'from a nest-dweller' or 'from a dwelling in a hole'.