योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-99, verse-4

विचारालोकलभ्येयं यदैकेनैव वस्तुना ।
पूर्णा नान्येन संयुक्ता केवलेव तदैव सा ॥ ४ ॥

vicārālokalabhyeyaṃ yadaikenaiva vastunā ,
pūrṇā nānyena saṃyuktā kevaleva tadaiva sā 4

4. vicārālokalabhyā iyam yadā ekena eva vastunā
pūrṇā na anyena saṃyuktā kevalā iva tadā eva sā

4. iyam sā vicārālokalabhyā yadā ekena eva vastunā
pūrṇā anyena na saṃyuktā tadā eva kevalā iva

4. This (truth or state), which is attained through the light of reflection, when it is complete by means of one entity (vastu) alone and not conjoined with another, then it is indeed solitary.

Words meanings summery:

• विचारालोकलभ्या (vicārālokalabhyā) - attainable by the light of reflection; accessible through discernment

• इयम् (iyam) - this (feminine)

• यदा (yadā) - when, at which time

• एकेन (ekena) - by one, by a single

• एव (eva) - only, just, indeed, certainly

• वस्तुना (vastunā) - by an entity, by a substance, by a thing

• पूर्णा (pūrṇā) - complete, full, perfected

• न (na) - not, no

• अन्येन (anyena) - by another, by a different one

• संयुक्ता (saṁyuktā) - joined, conjoined, connected, united

• केवला (kevalā) - alone, solitary, exclusive, pure

• इव (iva) - like, as, as if

• तदा (tadā) - then, at that time

• एव (eva) - only, just, indeed, certainly

• सा (sā) - she, that (feminine)

Words meanings and morphology

विचारालोकलभ्या (vicārālokalabhyā) - attainable by the light of reflection; accessible through discernment

(adjective)

Nominative, feminine, singular of vicārālokalabhyā

vicārālokalabhyā - attainable by the light of reflection; accessible through discernment

Compound adjective: vicāra (reflection/discernment) + āloka (light) + labhyā (attainable).

Compound type : tatpuruṣa (vicāra+āloka+labhya)

• vicāra – reflection, discernment, investigation, consideration
  noun (masculine)
  Derived from vi-car (to move, wander, consider).
  Prefix: vi
  Root: car (class 1)
• āloka – light, vision, sight, perception
  noun (masculine)
  Derived from ā-lok (to see, perceive).
  Prefix: ā
  Root: lok (class 10)
• labhya – attainable, to be obtained, accessible
  adjective (neuter)
  Gerundive
  Formed with suffix -ya from root labh.
  Root: labh (class 1)

इयम् (iyam) - this (feminine)

(pronoun)

Nominative, feminine, singular of idam

idam - this, this one

यदा (yadā) - when, at which time

(indeclinable)

एकेन (ekena) - by one, by a single

(numeral adjective)

Note: Can be used as a pronoun too.

एव (eva) - only, just, indeed, certainly

(indeclinable)

वस्तुना (vastunā) - by an entity, by a substance, by a thing

(noun)

Instrumental, neuter, singular of vastu

vastu - entity (vastu), object, substance, thing, reality

Root: vas (class 10)

पूर्णा (pūrṇā) - complete, full, perfected

(adjective)

Nominative, feminine, singular of pūrṇa

pūrṇa - complete, full, perfected, filled

Past Passive Participle

From root pṛ (to fill).

Root: pṛ (class 9)

न (na) - not, no

(indeclinable)

अन्येन (anyena) - by another, by a different one

(pronoun)

Instrumental, masculine, singular of anya

anya - another, other, different

संयुक्ता (saṁyuktā) - joined, conjoined, connected, united

(adjective)

Nominative, feminine, singular of saṃyukta

saṁyukta - joined, conjoined, connected, united

Past Passive Participle

From sam-yuj (to join together).

Prefix: sam

Root: yuj (class 7)

केवला (kevalā) - alone, solitary, exclusive, pure

(adjective)

Nominative, feminine, singular of kevala

kevala - alone, solitary, exclusive, pure, absolute

इव (iva) - like, as, as if

(indeclinable)

तदा (tadā) - then, at that time

(indeclinable)

एव (eva) - only, just, indeed, certainly

(indeclinable)

सा (sā) - she, that (feminine)

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it

Note: Refers to iyam.