योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-81, verse-45

तां यदा पूरकाभ्यासादापूर्य स्थीयते समम् ।
तदैति मैरवं स्थैर्यं कायस्यापीनता तथा ॥ ४५ ॥

tāṃ yadā pūrakābhyāsādāpūrya sthīyate samam ,
tadaiti mairavaṃ sthairyaṃ kāyasyāpīnatā tathā 45

45. tām yadā pūrakābhyāsāt āpūrya sthīyate samam tadā
eti mairavam sthairyam kāyasya āpīnatā tathā

45. yadā pūrakābhyāsāt tām āpūrya samam sthīyate tadā
kāyasya mairavam sthairyam āpīnatā tathā eti

45. When, through the practice of pūraka (inhalation), she (Kuṇḍalinī) is completely filled and one remains steadily (in that state), then the body attains mountain-like stability and also fullness.

Words meanings summery:

• ताम् (tām) - refers to Kuṇḍalinī (the subject of the previous verse) (her, that (feminine singular accusative))

• यदा (yadā) - when

• पूरकाभ्यासात् (pūrakābhyāsāt) - from the practice of pūraka (inhalation)

• आपूर्य (āpūrya) - having filled, by filling completely

• स्थीयते (sthīyate) - one remains, is made to stay, is stayed

• समम् (samam) - equally, steadily, balanced, uniformly

• तदा (tadā) - then, at that time

• एति (eti) - comes, goes, attains

• मैरवम् (mairavam) - mountain-like, firm, solid

• स्थैर्यम् (sthairyam) - steadiness, firmness, stability

• कायस्य (kāyasya) - of the body

• आपीनता (āpīnatā) - fullness, plumpness, stoutness, bodily expansion

• तथा (tathā) - and, similarly, thus

Words meanings and morphology

ताम् (tām) - refers to Kuṇḍalinī (the subject of the previous verse) (her, that (feminine singular accusative))

(pronoun)

Accusative, feminine, singular of tad

tad - that, she, it

यदा (yadā) - when

(indeclinable)

पूरकाभ्यासात् (pūrakābhyāsāt) - from the practice of pūraka (inhalation)

(noun)

Ablative, masculine, singular of pūrakābhyāsa

pūrakābhyāsa - practice of pūraka (inhalation)

Compound type : tatpuruṣa (pūraka+abhyāsa)

• pūraka – inhalation, act of filling, a kind of breath exercise
  noun (masculine)
  Root: pūr (class 10)
• abhyāsa – practice, exercise, repetition, study
  noun (masculine)
  Prefix: abhi
  Root: as (class 4)

आपूर्य (āpūrya) - having filled, by filling completely

(indeclinable)

absolutive (gerund)

Formed from root pūr (class 10) with prefix ā.

Prefix: ā

Root: pūr (class 10)

स्थीयते (sthīyate) - one remains, is made to stay, is stayed

(verb)

3rd person , singular, passive, present (laṭ) of sthā

Present 3rd person singular, passive voice of root 'sthā' (class 1).

Root: sthā (class 1)

समम् (samam) - equally, steadily, balanced, uniformly

(indeclinable)

तदा (tadā) - then, at that time

(indeclinable)

एति (eti) - comes, goes, attains

(verb)

3rd person , singular, active, present (laṭ) of i

Present 3rd person singular, active voice of root 'i' (class 2 ad-ādi).

Root: i (class 2)

मैरवम् (mairavam) - mountain-like, firm, solid

(adjective)

Nominative, neuter, singular of mairava

mairava - relating to Meru, mountain-like, firm, immense

Derived from Meru (a mythical mountain).

स्थैर्यम् (sthairyam) - steadiness, firmness, stability

(noun)

Nominative, neuter, singular of sthairya

sthairya - steadiness, firmness, stability, immobility

Derived from 'sthira' (firm, steady).

कायस्य (kāyasya) - of the body

(noun)

Genitive, masculine, singular of kāya

kāya - body, collection, heap

आपीनता (āpīnatā) - fullness, plumpness, stoutness, bodily expansion

(noun)

Nominative, feminine, singular of āpīnatā

āpīnatā - fullness, plumpness, fatness, stoutness, corpulence, bodily expansion

Derived from 'āpīna' (fat, plump).

तथा (tathā) - and, similarly, thus

(indeclinable)