योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-21, verse-29

यो यया वर्तते वृत्त्या स तयैव विना क्षयी ।
अतश्चित्तोपशान्त्यर्थं तद्वृत्तिं प्रक्षयं नय ॥ २९ ॥

yo yayā vartate vṛttyā sa tayaiva vinā kṣayī ,
ataścittopaśāntyarthaṃ tadvṛttiṃ prakṣayaṃ naya 29

29. yaḥ yayā vartate vṛttyā saḥ tayā eva vinā kṣayī
ataḥ cittopaśāntyartham tadvṛttim prakṣayam naya

29. yaḥ yayā vṛttyā vartate saḥ tayā eva vinā kṣayī
ataḥ cittopaśāntyartham tadvṛttim prakṣayam naya

29. Whoever identifies with and persists by a particular mental disposition (vṛtti) will experience loss and decay when that disposition is absent. Therefore, for the sake of the mind's tranquility, bring that very disposition to complete destruction.

Words meanings summery:

• यः (yaḥ) - whoever (who, whoever, which)

• यया (yayā) - by which (by which, with which)

• वर्तते (vartate) - persists (exists, lives, behaves, occurs)

• वृत्त्या (vṛttyā) - by a particular mental disposition (vṛtti) (by a mode, by a disposition, by an activity, by means of livelihood)

• सः (saḥ) - he (he, that)

• तया (tayā) - by that (by that, with that)

• एव (eva) - very (that very one) (indeed, only, just, alone)

• विना (vinā) - without (without, except for)

• क्षयी (kṣayī) - subject to loss and decay (perishable, subject to decay, losing, destructive)

• अतः (ataḥ) - therefore (therefore, hence, from this)

• चित्तोपशान्त्यर्थम् (cittopaśāntyartham) - for the sake of the mind's tranquility (for the sake of mind's tranquility)

• तद्वृत्तिम् (tadvṛttim) - that very disposition (that disposition)

• प्रक्षयम् (prakṣayam) - to complete destruction (to destruction, to loss)

• नय (naya) - bring (lead, guide, bring, take)

Words meanings and morphology

यः (yaḥ) - whoever (who, whoever, which)

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what

Note: Relative pronoun

यया (yayā) - by which (by which, with which)

(pronoun)

Instrumental, feminine, singular of yad

yad - who, which, what

Note: Relative pronoun

वर्तते (vartate) - persists (exists, lives, behaves, occurs)

(verb)

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

present tense

Root: vṛt (class 1)

वृत्त्या (vṛttyā) - by a particular mental disposition (vṛtti) (by a mode, by a disposition, by an activity, by means of livelihood)

(noun)

Instrumental, feminine, singular of vṛtti

vṛtti - mode of being, disposition, activity, livelihood, mental modification

from root vṛt

Root: vṛt (class 1)

सः (saḥ) - he (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - he, she, it, that

तया (tayā) - by that (by that, with that)

(pronoun)

Instrumental, feminine, singular of tad

tad - he, she, it, that

Note: Refers to vṛtti

एव (eva) - very (that very one) (indeed, only, just, alone)

(indeclinable)

विना (vinā) - without (without, except for)

(indeclinable)

क्षयी (kṣayī) - subject to loss and decay (perishable, subject to decay, losing, destructive)

(adjective)

Nominative, masculine, singular of kṣayin

kṣayin - perishable, decaying, losing, destructive

from root kṣi (to decay, destroy)

Root: kṣi

Note: Qualifies 'saḥ'

अतः (ataḥ) - therefore (therefore, hence, from this)

(indeclinable)

चित्तोपशान्त्यर्थम् (cittopaśāntyartham) - for the sake of the mind's tranquility (for the sake of mind's tranquility)

(noun)

Accusative, neuter, singular of cittopaśāntyartha

cittopaśāntyartha - for the purpose of mind's tranquility

Compound type : tatpuruṣa (citta+upaśānti+artha)

• citta – mind, consciousness
  noun (neuter)
  Root: cit
• upaśānti – tranquility, pacification, cessation
  noun (feminine)
  Prefix: upa
  Root: śam (class 4)
• artha – purpose, meaning, wealth, object
  noun (masculine)
  Root: ṛ

Note: Used as an adverbial accusative for purpose

तद्वृत्तिम् (tadvṛttim) - that very disposition (that disposition)

(noun)

Accusative, feminine, singular of tadvṛtti

tadvṛtti - that disposition

Compound type : tatpuruṣa (tad+vṛtti)

• tad – that, he, she, it
  pronoun (neuter)
• vṛtti – mode of being, disposition, activity, livelihood, mental modification
  noun (feminine)
  Root: vṛt (class 1)

Note: Refers to the vṛtti mentioned earlier.

प्रक्षयम् (prakṣayam) - to complete destruction (to destruction, to loss)

(noun)

Accusative, masculine, singular of prakṣaya

prakṣaya - destruction, complete decay, loss

from pra-kṣi

Prefix: pra

Root: kṣi

Note: Governed by naya

नय (naya) - bring (lead, guide, bring, take)

(verb)

2nd person , singular, active, imperative (loṭ) of nī

imperative

Root: nī (class 1)