योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-82, verse-18

यदा तु ज्ञानदीपेन सम्यगालोक आगतः ।
संकल्पमोहो जीवस्य क्षीयते शरदभ्रवत् ॥ १८ ॥

yadā tu jñānadīpena samyagāloka āgataḥ ,
saṃkalpamoho jīvasya kṣīyate śaradabhravat 18

18. yada tu jñānadīpena samyak ālokaḥ āgataḥ
saṅkalpamohaḥ jīvasya kṣīyate śaradabhravat

18. yada jñānadīpena samyak ālokaḥ āgataḥ tu,
jīvasya saṅkalpamohaḥ śaradabhravat kṣīyate

18. When, indeed, perfect illumination is achieved by the lamp of true knowledge, then the delusion of conceptualization of the individual soul (jīva) dissipates like an autumn cloud.

Words meanings summery:

• यद (yada) - when

• तु (tu) - indeed, but, however

• ज्ञानदीपेन (jñānadīpena) - by the lamp of knowledge

• सम्यक् (samyak) - completely, perfectly, rightly

• आलोकः (ālokaḥ) - light, illumination, perception

• आगतः (āgataḥ) - arrived, come, attained

• सङ्कल्पमोहः (saṅkalpamohaḥ) - delusion of conceptualization, infatuation of desire

• जीवस्य (jīvasya) - of the individual soul (jīva)

• क्षीयते (kṣīyate) - is destroyed, wastes away, disappears

• शरदभ्रवत् (śaradabhravat) - like an autumn cloud

Words meanings and morphology

यद (yada) - when

(indeclinable)

तु (tu) - indeed, but, however

(indeclinable)

ज्ञानदीपेन (jñānadīpena) - by the lamp of knowledge

(noun)

Instrumental, masculine, singular of jñānadīpa

jñānadīpa - lamp of knowledge

Compound type : tatpuruṣa (jñāna+dīpa)

• jñāna – knowledge, wisdom
  noun (neuter)
  Root: jñā (class 9)
• dīpa – lamp, light
  noun (masculine)
  Root: dīp (class 4)

सम्यक् (samyak) - completely, perfectly, rightly

(indeclinable)

आलोकः (ālokaḥ) - light, illumination, perception

(noun)

Nominative, masculine, singular of āloka

āloka - light, illumination, seeing, perception

Prefix: ā

Root: lok (class 1)

आगतः (āgataḥ) - arrived, come, attained

(adjective)

Nominative, masculine, singular of āgata

āgata - arrived, come, obtained, known

Past Passive Participle

From root gam with prefix ā

Prefix: ā

Root: gam (class 1)

सङ्कल्पमोहः (saṅkalpamohaḥ) - delusion of conceptualization, infatuation of desire

(noun)

Nominative, masculine, singular of saṅkalpamoha

saṅkalpamoha - delusion of conceptualization/intention/desire

Compound type : tatpuruṣa (saṅkalpa+moha)

• saṅkalpa – conceptualization, intention, resolve, will, desire
  noun (masculine)
  Prefix: sam
  Root: kḷp (class 1)
• moha – delusion, infatuation, bewilderment
  noun (masculine)
  Root: muh (class 4)

जीवस्य (jīvasya) - of the individual soul (jīva)

(noun)

Genitive, masculine, singular of jīva

jīva - individual soul, living being, life

Root: jīv (class 1)

क्षीयते (kṣīyate) - is destroyed, wastes away, disappears

(verb)

3rd person , singular, passive, present (lat) of kṣī

present tense, passive voice

root kṣi (4th class), ātmanepada, passive form kṣīyate

Root: kṣi (class 4)

शरदभ्रवत् (śaradabhravat) - like an autumn cloud

(indeclinable)

Compound noun + vat suffix

Compound type : tatpuruṣa (śarad+abhra)

• śarad – autumn
  noun (feminine)
• abhra – cloud, sky
  noun (neuter)