योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-187, verse-54

तत्र यच्चिद्विलासस्य प्रकाशानुभवो भवेत् ।
रूपतन्मात्रकं तद्वद्भविष्यदभिधार्थदम् ॥ ५४ ॥

tatra yaccidvilāsasya prakāśānubhavo bhavet ,
rūpatanmātrakaṃ tadvadbhaviṣyadabhidhārthadam 54

54. tatra yat citvilāsasya prakāśānubhavaḥ bhavet
rūpatanmātrakam tadvat bhaviṣyat abhidhārthadam

54. tatra yat citvilāsasya prakāśānubhavaḥ bhavet,
tadvat rūpatanmātrakam bhaviṣyat abhidhārthadam

54. Whatever experience of manifestation (prakāśānubhava) arises from the play of consciousness (citvilāsa) there, that subtle element of form (rūpatanmātra) will similarly be the source giving meaning to future names and concepts.

Words meanings summery:

• तत्र (tatra) - there, in that place, in that case

• यत् (yat) - which, whatever

• चित्विलासस्य (citvilāsasya) - of the play of consciousness, of the manifestation of awareness

• प्रकाशानुभवः (prakāśānubhavaḥ) - experience of light/manifestation, perception of luminosity

• भवेत् (bhavet) - may be, might be, should be

• रूपतन्मात्रकम् (rūpatanmātrakam) - the subtle element of form, form-tanmātra

• तद्वत् (tadvat) - like that, similarly, in that manner

• भविष्यत् (bhaviṣyat) - that which will be, future, impending

• अभिधार्थदम् (abhidhārthadam) - giving meaning to names/designations

Words meanings and morphology

तत्र (tatra) - there, in that place, in that case

(indeclinable)

यत् (yat) - which, whatever

(pronoun)

Nominative, neuter, singular of yad

yad - which, what

चित्विलासस्य (citvilāsasya) - of the play of consciousness, of the manifestation of awareness

(noun)

Genitive, masculine, singular of citvilāsa

citvilāsa - play/manifestation of consciousness

Compound type : ṣaṣṭhī-tatpuruṣa (cit+vilāsa)

• cit – pure consciousness, awareness
  noun (feminine)
  Root: cit (class 1)
• vilāsa – play, sport, manifestation, charm
  noun (masculine)
  Derived from root 'las' with prefix 'vi'.
  Prefix: vi
  Root: las (class 1)

प्रकाशानुभवः (prakāśānubhavaḥ) - experience of light/manifestation, perception of luminosity

(noun)

Nominative, masculine, singular of prakāśānubhava

prakāśānubhava - experience of light or manifestation

Compound type : ṣaṣṭhī-tatpuruṣa (prakāśa+anubhava)

• prakāśa – light, brightness, manifestation, appearance
  noun (masculine)
  Derived from root 'kāś' with prefix 'pra'.
  Prefix: pra
  Root: kāś (class 1)
• anubhava – experience, perception, apprehension
  noun (masculine)
  Derived from root 'bhū' with prefix 'anu'.
  Prefix: anu
  Root: bhū (class 1)

भवेत् (bhavet) - may be, might be, should be

(verb)

3rd person , singular, active, optative (vidhiliṅ) of bhū

Root: bhū (class 1)

रूपतन्मात्रकम् (rūpatanmātrakam) - the subtle element of form, form-tanmātra

(noun)

Nominative, neuter, singular of rūpatanmātraka

rūpatanmātraka - the subtle element of form (rūpa-tanmātra)

Compound type : karmadhāraya (rūpa+tanmātraka)

• rūpa – form, shape, appearance
  noun (neuter)
• tanmātraka – subtle element, rudimentary element, a tanmātra
  noun (neuter)

तद्वत् (tadvat) - like that, similarly, in that manner

(indeclinable)

Derived from 'tad' (that) with suffix '-vat'.

Note: Adverbial usage.

भविष्यत् (bhaviṣyat) - that which will be, future, impending

(adjective)

Nominative, neuter, singular of bhaviṣyat

bhaviṣyat - being about to be, future, that which will be

Present Active Participle

Derived from root 'bhū' (to be, become).

Root: bhū (class 1)

Note: Functions as a noun here meaning 'the future (thing)'.

अभिधार्थदम् (abhidhārthadam) - giving meaning to names/designations

(adjective)

Nominative, neuter, singular of abhidhārthada

abhidhārthada - giving meaning to names or designations

Compound type : tatpuruṣa (abhidhā+artha+da)

• abhidhā – name, designation, appellation
  noun (feminine)
• artha – meaning, sense, purpose
  noun (masculine)
• da – giving, granting, bestowing
  adjective (masculine)
  Agent noun derived from root 'dā' (to give).
  Root: dā (class 1)

Note: Qualifies 'rūpatanmātrakam'.