योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-58, verse-16

सद्वासनस्य रूढायामातिवाहिकसंविदि ।
देहो विस्मृतिमायाति गर्भसंस्थेव यौवने ॥ १६ ॥

sadvāsanasya rūḍhāyāmātivāhikasaṃvidi ,
deho vismṛtimāyāti garbhasaṃstheva yauvane 16

16. sadvāsanāsya rūḍhāyām ātivāhika-saṃvidi dehaḥ
vismṛtim āyāti garbhasaṃsthā iva yauvane

16. ātivāhika-saṃvidi sadvāsanāsya rūḍhāyām dehaḥ
vismṛtim āyāti garbhasaṃsthā yauvane iva

16. When a positive innate tendency (sadvāsanā) becomes deeply rooted in the subtle body's consciousness (ātivāhika-saṃvit), the physical body is forgotten, much like one forgets their state in the womb upon reaching youth.

Words meanings summery:

• सद्वासनास्य (sadvāsanāsya) - of the good impression, of the pure desire

• रूढायाम् (rūḍhāyām) - when firmly established, deeply rooted

• आतिवाहिक-संविदि (ātivāhika-saṁvidi) - in the subtle consciousness, in the consciousness of the subtle body

• देहः (dehaḥ) - the physical body (the body)

• विस्मृतिम् (vismṛtim) - forgetfulness, oblivion

• आयाति (āyāti) - comes, reaches, attains

• गर्भसंस्था (garbhasaṁsthā) - the state of being in the womb, a fetus

• इव (iva) - like, as, as if

• यौवने (yauvane) - in youth, in adolescence

Words meanings and morphology

सद्वासनास्य (sadvāsanāsya) - of the good impression, of the pure desire

(noun)

Genitive, feminine, singular of sadvāsanā

sadvāsanā - good impression, positive latent tendency, pure desire

Compound type : karmadhāraya (sat+vāsanā)

• sat – good, true, real, existing
  adjective
  Present Active Participle
  Root: as (class 2)
• vāsanā – impression, latent tendency, predisposition, desire
  noun (feminine)

रूढायाम् (rūḍhāyām) - when firmly established, deeply rooted

(adjective)

Locative, feminine, singular of rūḍha

rūḍha - established, deeply rooted, firm, ascended

Past Passive Participle

Root: ruh (class 1)

आतिवाहिक-संविदि (ātivāhika-saṁvidi) - in the subtle consciousness, in the consciousness of the subtle body

(noun)

Locative, feminine, singular of ātivāhika-saṃvit

ātivāhika-saṁvit - subtle consciousness, consciousness of the subtle body

Compound type : tatpuruṣa (ātivāhika+saṃvit)

• ātivāhika – relating to the subtle body, transitional body
  adjective
• saṃvit – consciousness, knowledge, intelligence, understanding
  noun (feminine)
  Prefix: sam
  Root: vid (class 2)

देहः (dehaḥ) - the physical body (the body)

(noun)

Nominative, masculine, singular of deha

deha - body, physical form

विस्मृतिम् (vismṛtim) - forgetfulness, oblivion

(noun)

Accusative, feminine, singular of vismṛti

vismṛti - forgetfulness, oblivion, absence of memory

Prefix: vi

Root: smṛ (class 1)

आयाति (āyāti) - comes, reaches, attains

(verb)

3rd person , singular, active, present indicative (laṭ) of ā-yā

Prefix: ā

Root: yā (class 2)

गर्भसंस्था (garbhasaṁsthā) - the state of being in the womb, a fetus

(noun)

Nominative, feminine, singular of garbhasaṃsthā

garbhasaṁsthā - state of being in the womb, embryo, fetus (feminine form of garbhasaṃstha)

Compound type : tatpuruṣa (garbha+saṃsthā)

• garbha – womb, embryo, fetus, interior
  noun (masculine)
• saṃsthā – state, condition, presence, situated
  noun (feminine)
  Prefix: sam
  Root: sthā (class 1)

इव (iva) - like, as, as if

(indeclinable)

यौवने (yauvane) - in youth, in adolescence

(noun)

Locative, neuter, singular of yauvana

yauvana - youth, adolescence, young age