योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-44, verse-37

अवतीर्णस्तदाऽज्ञानात्तथैव सुखमस्मृतम् ।
गर्भनिद्राव्यपगमे वपुः पश्यति भास्वरम् ॥ ३७ ॥

avatīrṇastadā'jñānāttathaiva sukhamasmṛtam ,
garbhanidrāvyapagame vapuḥ paśyati bhāsvaram 37

37. avatīrṇaḥ tadā ajñānāt tathaiva sukham asmṛtam
garbhanidrāvyapagame vapuḥ paśyati bhāsvaram

37. yadā eṣaḥ (prabhuḥ) brahmaṇaḥ padāt avatīrṇaḥ,
tadā ajñānāt tathaiva sukham asmṛtam (abhavat).
garbhanidrāvyapagame (saḥ) bhāsvaram vapuḥ paśyati.

37. ...descended, then, due to ignorance, happiness was likewise forgotten. Upon the cessation of the slumber of the womb, he sees a dazzling body.

Words meanings summery:

• अवतीर्णः (avatīrṇaḥ) - descended; alighted; appeared

• तदा (tadā) - then; at that time

• अज्ञानात् (ajñānāt) - (due to) non-knowledge of one's true nature (from ignorance; due to ignorance)

• तथैव (tathaiva) - in the same way; thus; similarly

• सुखम् (sukham) - happiness; pleasure; ease

• अस्मृतम् (asmṛtam) - forgotten; not remembered

• गर्भनिद्राव्यपगमे (garbhanidrāvyapagame) - upon awakening from the unconscious state of embryonic development (at the cessation/removal of the sleep of the womb)

• वपुः (vapuḥ) - (his own) body/true form (body; form; figure)

• पश्यति (paśyati) - sees; beholds

• भास्वरम् (bhāsvaram) - dazzling; luminous; radiant

Words meanings and morphology

अवतीर्णः (avatīrṇaḥ) - descended; alighted; appeared

(verbal participle)

Note: Qualifies 'eṣaḥ' (the Lord).

तदा (tadā) - then; at that time

(indeclinable)

अज्ञानात् (ajñānāt) - (due to) non-knowledge of one's true nature (from ignorance; due to ignorance)

(noun)

Ablative, neuter, singular of ajñāna

ajñāna - ignorance; lack of knowledge

Tatpurusha compound 'na jñāna'.

Compound type : Tatpurusha (a+jñāna)

• a – not; without
  indeclinable
• jñāna – knowledge; wisdom
  noun (neuter)

Note: Indicates cause.

तथैव (tathaiva) - in the same way; thus; similarly

(indeclinable)

Sandhi of 'tathā' (thus) and 'eva' (indeed, just).

सुखम् (sukham) - happiness; pleasure; ease

(noun)

Nominative, neuter, singular of sukha

sukha - happiness; pleasure; ease

Note: Subject of 'asmṛtam'.

अस्मृतम् (asmṛtam) - forgotten; not remembered

(verbal participle)

Compound type : Tatpurusha (a+smṛta)

• a – not; without
  indeclinable
• smṛta – remembered; recollected
  verbal derivative (neuter)
  Past Passive Participle
  From root 'smṛ' (to remember).
  Root: smṛ (class 1)

गर्भनिद्राव्यपगमे (garbhanidrāvyapagame) - upon awakening from the unconscious state of embryonic development (at the cessation/removal of the sleep of the womb)

(noun)

Locative, masculine, singular of garbhanidrāvyapagama

garbhanidrāvyapagama - cessation of the sleep of the womb

Long Tatpurusha compound: 'garbha-nidrā' (sleep of the womb) + 'vyapagama' (cessation).

Compound type : Tatpurusha (garbha+nidrā+vyapagama)

• garbha – womb; embryo; interior
  noun (masculine)
• nidrā – sleep; slumber
  noun (feminine)
• vyapagama – cessation; departure; removal
  noun (masculine)
  From prefixes 'vi' and 'apa' with root 'gam' (to go).
  Prefixes: vi+apa
  Root: gam (class 1)

Note: Indicates time 'when'.

वपुः (vapuḥ) - (his own) body/true form (body; form; figure)

(noun)

Accusative, neuter, singular of vapus

vapus - body; form; figure

s-stem neuter noun.

Note: Object of 'paśyati'.

पश्यति (paśyati) - sees; beholds

(verb)

3rd person , singular, active, present indicative (laṭ) of dṛś

Present active indicative

Present stem 'paśya' from root 'dṛś'.

Root: dṛś (class 1)

भास्वरम् (bhāsvaram) - dazzling; luminous; radiant

(adjective)

Accusative, neuter, singular of bhāsvara

bhāsvara - dazzling; luminous; radiant

From root 'bhās' (to shine).

Root: bhās

Note: Qualifies 'vapuḥ'.