योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-75, verse-20

स्वकर्मणैव देहोऽयं यावत्सत्त्वमनिच्छया ।
धारणीय इति स्वेन कर्मणैवाथ तस्थतुः ॥ २० ॥

svakarmaṇaiva deho'yaṃ yāvatsattvamanicchayā ,
dhāraṇīya iti svena karmaṇaivātha tasthatuḥ 20

20. svakarmaṇā eva dehaḥ ayam yāvat sattvam anicchayā
dhāraṇīyaḥ iti svena karmaṇā eva atha tasthatuḥ

20. ayam dehaḥ yāvat sattvam anicchayā svakarmaṇā eva
dhāraṇīyaḥ iti atha svena karmaṇā eva tasthatuḥ

20. This body, as long as life (sattva) endures, should be maintained solely by one's own action (karma), without personal desire; thus having resolved, they both then abided by their own action (karma) alone.

Words meanings summery:

• स्वकर्मणा (svakarmaṇā) - by one's own action (karma)

• एव (eva) - only, indeed, just

• देहः (dehaḥ) - body

• अयम् (ayam) - this

• यावत् (yāvat) - as long as, as much as

• सत्त्वम् (sattvam) - existence, life, being, vitality, goodness (sattva)

• अनिच्छया (anicchayā) - without desire, unwillingly

• धारणीयः (dhāraṇīyaḥ) - to be maintained, to be supported, fit to be held

• इति (iti) - thus, in this manner (indicating direct speech or thought)

• स्वेन (svena) - by one's own

• कर्मणा (karmaṇā) - by action (karma)

• एव (eva) - only, indeed, just

• अथ (atha) - then, thereafter, now

• तस्थतुः (tasthatuḥ) - they two stood, they two remained, they two abided

Words meanings and morphology

स्वकर्मणा (svakarmaṇā) - by one's own action (karma)

(noun)

Instrumental, neuter, singular of svakarma

svakarma - one's own action, one's own duty (karma)

Tatpuruṣa compound.

Compound type : tatpuruṣa (sva+karma)

• sva – own, one's own
  adjective (neuter)
• karma – action, deed, work, ritual action (karma)
  noun (neuter)
  From √kṛ (to do).
  Root: √kṛ (class 8)

Note: Agent for 'dhāraṇīyaḥ'.

एव (eva) - only, indeed, just

(indeclinable)

Emphatic particle.

Note: Emphasizes 'svakarmaṇā'.

देहः (dehaḥ) - body

(noun)

Nominative, masculine, singular of deha

deha - body, form, person

From √dih (to anoint, smear).

Root: √dih (class 1)

Note: Subject of 'dhāraṇīyaḥ'.

अयम् (ayam) - this

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Demonstrative pronoun.

Note: Agrees with 'dehaḥ'.

यावत् (yāvat) - as long as, as much as

(indeclinable)

Correlative adverb/adjective.

Note: Part of the compound 'yāvatsattvam'.

सत्त्वम् (sattvam) - existence, life, being, vitality, goodness (sattva)

(noun)

Accusative, neuter, singular of sattva

sattva - existence, being, life, reality, essence, spirit, goodness, truth (sattva)

From √as (to be) + -tva suffix.

Root: √as (class 2)

Note: Part of compound 'yāvatsattvam' meaning 'as long as sattva'.

अनिच्छया (anicchayā) - without desire, unwillingly

(noun)

Instrumental, feminine, singular of anicchā

anicchā - absence of desire, unwillingness, disinclination

Negative compound (nañ-tatpuruṣa) of icchā.

Compound type : nañ-tatpuruṣa (an+icchā)

• an – not, non-
  indeclinable
  Negative prefix.
• icchā – desire, wish, inclination
  noun (feminine)
  From √iṣ (to wish, desire).
  Root: √iṣ (class 4)

Note: Describes the manner of maintaining the body.

धारणीयः (dhāraṇīyaḥ) - to be maintained, to be supported, fit to be held

(participle)

Nominative, masculine, singular of dhāraṇīya

dhāraṇīya - to be held, to be borne, to be supported, to be maintained

Gerundive / Potential Passive Participle

Formed from √dhṛ (to hold, support) in causative sense (dhāraya-) with suffix -anīya.

Root: √dhṛ (class 10)

Note: Predicate for 'dehaḥ'.

इति (iti) - thus, in this manner (indicating direct speech or thought)

(indeclinable)

Note: Marks the conclusion of their determination.

स्वेन (svena) - by one's own

(adjective)

Instrumental, neuter, singular of sva

sva - one's own, self

Reflexive possessive pronoun.

Note: Agrees with 'karmaṇā'.

कर्मणा (karmaṇā) - by action (karma)

(noun)

Instrumental, neuter, singular of karma

karma - action, deed, work, ritual action (karma)

From √kṛ (to do).

Root: √kṛ (class 8)

Note: Refers to their actions.

एव (eva) - only, indeed, just

(indeclinable)

Emphatic particle.

Note: Emphasizes 'svena karmaṇā'.

अथ (atha) - then, thereafter, now

(indeclinable)

Particle indicating sequence or commencement.

Note: Indicates the sequence after their resolution.

तस्थतुः (tasthatuḥ) - they two stood, they two remained, they two abided

(verb)

3rd person , dual, active, perfect (liṭ) of √sthā

Perfect active

From √sthā (to stand), Parasmaipada, perfect tense.

Root: √sthā (class 1)