योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-74, verse-16

शान्तसंकोचसूक्ष्मार्थं विकास्यास्यं रजोणुना ।
तयाद्य स्थगितं शीतवाताशननिवृत्तये ॥ १६ ॥

śāntasaṃkocasūkṣmārthaṃ vikāsyāsyaṃ rajoṇunā ,
tayādya sthagitaṃ śītavātāśananivṛttaye 16

16. śāntasaṃkocasūkṣmārtham vikāsya āsyam rajoṇunā
tayā adya sthagitaṃ śītavātāśananivṛttaye

16. tayā adya śāntasaṃkocasūkṣmārtham āsyam rajoṇunā
vikāsya śītavātāśananivṛttaye sthagitaṃ

16. Her mouth, whose subtle form was serenely contracted, she would (previously) open only to partake of the slightest sustenance, like a speck of dust. But today, she has completely sealed it to prevent cold, wind, and hunger.

Words meanings summery:

• शान्तसंकोचसूक्ष्मार्थम् (śāntasaṁkocasūkṣmārtham) - whose subtle aperture was serenely closed/contracted (referring to the mouth) (having a subtle meaning/form that is calmly contracted)

• विकास्य (vikāsya) - having opened (her mouth) (having caused to open, having expanded)

• आस्यम् (āsyam) - her mouth/aperture (mouth, face, aperture)

• रजोणुना (rajoṇunā) - indicating a very minute quantity (of sustenance), or a very slight degree (of opening) (by a speck of dust, by a minute particle)

• तया (tayā) - by Pārvatī (by her)

• अद्य (adya) - today, currently (today, now)

• स्थगितं (sthagitaṁ) - completely sealed/closed (stopped, obstructed, covered, sealed)

• शीतवाताशननिवृत्तये (śītavātāśananivṛttaye) - to prevent cold, wind, and hunger (for the cessation of cold, wind, and hunger/eating)

Words meanings and morphology

शान्तसंकोचसूक्ष्मार्थम् (śāntasaṁkocasūkṣmārtham) - whose subtle aperture was serenely closed/contracted (referring to the mouth) (having a subtle meaning/form that is calmly contracted)

(adjective)

Accusative, neuter, singular of śāntasaṃkocasūkṣmārtha

śāntasaṁkocasūkṣmārtha - whose subtle meaning/form is tranquilly contracted; whose contracted aperture is tranquil

Compound type : Bahuvrīhi (śānta+saṃkoca+sūkṣma+artha)

• śānta – tranquil, calm, pacified
  adjective (neuter)
  Past Passive Participle
  From root `śam` (to be calm) + kta.
  Root: śam (class 4)
• saṃkoca – contraction, shrinking, closing
  noun (masculine)
  From `sam-kuc`.
  Prefix: sam
  Root: kuc (class 1)
• sūkṣma – subtle, minute, delicate, fine
  adjective (neuter)
• artha – meaning, purpose, object, form, thing
  noun (masculine)

विकास्य (vikāsya) - having opened (her mouth) (having caused to open, having expanded)

(indeclinable)

Absolutive (gerund)

From root `kas` (to open, expand) with prefix `vi-` and suffix `-ya`.

Prefix: vi

Root: kas (class 1)

आस्यम् (āsyam) - her mouth/aperture (mouth, face, aperture)

(noun)

Accusative, neuter, singular of āsya

āsya - mouth, face, aperture

Note: The object of `vikāsya`.

रजोणुना (rajoṇunā) - indicating a very minute quantity (of sustenance), or a very slight degree (of opening) (by a speck of dust, by a minute particle)

(noun)

Instrumental, masculine, singular of rajoṇu

rajoṇu - a speck of dust, a tiny particle

`rajas` (dust) + `aṇu` (atom/particle).

Compound type : Tatpuruṣa (rajas+aṇu)

• rajas – dust, pollen, impurity, menstrual blood, quality of passion (rajas)
  noun (neuter)
• aṇu – atom, particle, minute, subtle
  noun (masculine)

Note: Used adverbially here to denote a very small quantity or degree.

तया (tayā) - by Pārvatī (by her)

(pronoun)

Instrumental, feminine, singular of tad

tad - that, she/it

Feminine singular instrumental form of the pronoun `tad`.

Note: Agent of `sthagitaṃ`.

अद्य (adya) - today, currently (today, now)

(indeclinable)

From `idam` + `dyas`.

स्थगितं (sthagitaṁ) - completely sealed/closed (stopped, obstructed, covered, sealed)

(adjective)

Nominative, neuter, singular of sthagita

sthagita - stopped, obstructed, covered

Past Passive Participle

From root `sthag` (to stop, obstruct) + kta.

Root: sthag (class 10)

शीतवाताशननिवृत्तये (śītavātāśananivṛttaye) - to prevent cold, wind, and hunger (for the cessation of cold, wind, and hunger/eating)

(noun)

Dative, feminine, singular of śītavātāśananivṛtti

śītavātāśananivṛtti - cessation/prevention of cold, wind, and hunger/eating

Compound type : Dvandva + Tatpuruṣa (śīta+vāta+aśana+nivṛtti)

• śīta – cold
  noun (neuter)
• vāta – wind, air
  noun (masculine)
  Root: vā (class 2)
• aśana – eating, food
  noun (neuter)
  From root `aś` (to eat) + ana.
  Root: aś (class 5)
• nivṛtti – cessation, stopping, abstention
  noun (feminine)
  From `ni-vṛt` + ti.
  Prefix: ni
  Root: vṛt (class 1)

Note: Purpose clause.