योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-16, verse-21

एकस्मिन्नेव वै तेषामभ्यस्ते विमलोदये ।
चत्वारोऽपि किलाभ्यस्ता भवन्ति सुधियां वर ॥ २१ ॥

ekasminneva vai teṣāmabhyaste vimalodaye ,
catvāro'pi kilābhyastā bhavanti sudhiyāṃ vara 21

21. ekasmin eva vai teṣām abhyaste vimalodaye catvāraḥ
api kila abhyastāḥ bhavanti sudhiyām vara

21. sudhiyām vara,
vai ekasmin teṣām vimalodaye abhyaste eva,
catvāraḥ api kila abhyastāḥ bhavanti

21. O best among the wise, indeed, when even one of those [four practices] is diligently followed, leading to a pure realization, all four are certainly mastered.

Words meanings summery:

• एकस्मिन् (ekasmin) - in one (of the four practices) (in one, in a single one)

• एव (eva) - indeed, certainly, only

• वै (vai) - verily, indeed

• तेषाम् (teṣām) - of those (four practices) (of them, amongst them)

• अभ्यस्ते (abhyaste) - when (one of them) is diligently followed/mastered (when practiced, in the practiced one, in one that is mastered)

• विमलोदये (vimalodaye) - leading to a pure realization (in a pure awakening, in a stainless rising, in a clean outcome)

• चत्वारः (catvāraḥ) - all four (practices) (four)

• अपि (api) - also, even

• किल (kila) - indeed, certainly, reportedly

• अभ्यस्ताः (abhyastāḥ) - practiced, mastered

• भवन्ति (bhavanti) - they become, they are

• सुधियाम् (sudhiyām) - of the wise, among the intelligent

• वर (vara) - O best, O excellent one

Words meanings and morphology

एकस्मिन् (ekasmin) - in one (of the four practices) (in one, in a single one)

(adjective)

Locative, masculine/neuter, singular of eka

eka - one, single, unique

Note: Refers to one of the four practices/paths.

एव (eva) - indeed, certainly, only

(indeclinable)

वै (vai) - verily, indeed

(indeclinable)

तेषाम् (teṣām) - of those (four practices) (of them, amongst them)

(pronoun)

Genitive, masculine/neuter, plural of tad

tad - that, those

Note: Refers to the implied four practices mentioned in the context of the larger text (satsaṅga, santoṣa, vicāra, śama).

अभ्यस्ते (abhyaste) - when (one of them) is diligently followed/mastered (when practiced, in the practiced one, in one that is mastered)

(adjective)

Locative, masculine/neuter, singular of abhyasta

abhyasta - practiced, mastered, studied, habituated

Past Passive Participle

Derived from root as (to throw/cast/project) with prefix abhi (towards/over), meaning 'thrown towards', then 'exercised, practiced'.

Prefix: abhi

Root: as (class 4)

Note: Modifies 'ekasmin' (implied: ekasmin sādhanā-pathe abhyaste).

विमलोदये (vimalodaye) - leading to a pure realization (in a pure awakening, in a stainless rising, in a clean outcome)

(noun)

Locative, masculine, singular of vimalodaya

vimalodaya - pure arising/dawn/outcome

Compound type : Tatpurusha (vimala+udaya)

• vimala – pure, clean, spotless, stainless
  adjective (masculine/feminine/neuter)
  Compound of vi (without) + mala (dirt/impurity).
  Prefix: vi
• udaya – rising, dawn, appearance, outcome, prosperity
  noun (masculine)
  Derived from root i (to go) with prefix ud (up).
  Prefix: ud
  Root: i (class 2)

Note: Refers to the state or result when the practice is mastered.

चत्वारः (catvāraḥ) - all four (practices) (four)

(numeral)

Note: Refers to the four means of liberation (satsaṅga, santoṣa, vicāra, śama).

अपि (api) - also, even

(indeclinable)

Note: Emphasizes that 'all four' are included.

किल (kila) - indeed, certainly, reportedly

(indeclinable)

अभ्यस्ताः (abhyastāḥ) - practiced, mastered

(adjective)

Nominative, masculine, plural of abhyasta

abhyasta - practiced, mastered, studied, habituated

Past Passive Participle

Derived from root as (to throw/cast/project) with prefix abhi (towards/over), meaning 'thrown towards', then 'exercised, practiced'.

Prefix: abhi

Root: as (class 4)

Note: Agrees with 'catvāraḥ'.

भवन्ति (bhavanti) - they become, they are

(verb)

3rd person , plural, active, present (laṭ) of bhū

Root: bhū (class 1)

सुधियाम् (sudhiyām) - of the wise, among the intelligent

(noun)

Genitive, masculine/feminine, plural of sudhī

sudhī - wise, intelligent, sagacious (as noun: a wise person, sage)

Compound of su (good) + dhī (intellect/thought).

Compound type : Bahuvrihi (su+dhī)

• su – good, well, excellent
  indeclinable/prefix
• dhī – intellect, thought, understanding, wisdom
  noun (feminine)
  Root dhā (to place, hold).
  Root: dhā (class 3)

Note: Used as a vocative qualifier for 'vara'.

वर (vara) - O best, O excellent one

(noun)

Vocative, masculine, singular of vara

vara - best, excellent, superior (as noun: boon, choice, bridegroom)

From root vṛ (to choose).

Root: vṛ (class 9)

Note: An address to a wise person.