योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-155, verse-55

ज्योतिःशास्त्रार्थविज्ञानैरिह भाव्यर्थवेदनम् ।
भवत्यन्यदपूर्वं तु न किंचन कदाचन ॥ ५५ ॥

jyotiḥśāstrārthavijñānairiha bhāvyarthavedanam ,
bhavatyanyadapūrvaṃ tu na kiṃcana kadācana 55

55. jyotiḥśāstrārthavijñānaiḥ iha bhāvyārthavedanam
bhavati anyat apūrvam tu na kiṃcana kadācana

55. iha jyotiḥśāstrārthavijñānaiḥ bhāvyārthavedanam
bhavati tu anyat apūrvam kiṃcana na kadācana

55. Here, the knowledge of what is destined to occur (bhāvya) is achieved through understanding the principles of astronomy/astrology (jyotiḥ-śāstra), yet nothing truly new or unprecedented ever comes into existence.

Words meanings summery:

• ज्योतिःशास्त्रार्थविज्ञानैः (jyotiḥśāstrārthavijñānaiḥ) - by understanding the principles of astronomy/astrology (jyotiḥ-śāstra) (by means of the knowledge of the meaning of astronomical/astrological texts)

• इह (iha) - here (in this context/world) (here, in this world, in this case)

• भाव्यार्थवेदनम् (bhāvyārthavedanam) - the knowledge of what is destined to occur (knowledge of future/destined matters)

• भवति (bhavati) - comes into existence, happens (becomes, is, comes into existence)

• अन्यत् (anyat) - anything else (other, another)

• अपूर्वम् (apūrvam) - entirely unprecedented (unprecedented, not seen before, new)

• तु (tu) - yet (but, on the other hand, indeed)

• न (na) - not (not, no)

• किंचन (kiṁcana) - anything (with na, 'nothing') (anything, something)

• कदाचन (kadācana) - ever (with na, 'never') (ever, at any time)

Words meanings and morphology

ज्योतिःशास्त्रार्थविज्ञानैः (jyotiḥśāstrārthavijñānaiḥ) - by understanding the principles of astronomy/astrology (jyotiḥ-śāstra) (by means of the knowledge of the meaning of astronomical/astrological texts)

(noun)

Instrumental, neuter, plural of jyotiḥśāstrārthavijñāna

jyotiḥśāstrārthavijñāna - the knowledge or understanding of the meaning of astronomical/astrological treatises

Compound type : tatpuruṣa (jyotis+śāstra+artha+vijñāna)

• jyotis – light, luster, star, heavenly body, astronomy/astrology (jyotiḥ-śāstra)
  noun (neuter)
  Root: dyut (class 1)
• śāstra – treatise, sacred book, scientific work, doctrine
  noun (neuter)
  From root śās (to teach, instruct).
  Root: śās (class 2)
• artha – meaning, purpose, object, wealth, thing
  noun (masculine)
• vijñāna – knowledge, wisdom, understanding, science
  noun (neuter)
  From root jñā (to know) with prefix vi.
  Prefix: vi
  Root: jñā (class 9)

इह (iha) - here (in this context/world) (here, in this world, in this case)

(indeclinable)

भाव्यार्थवेदनम् (bhāvyārthavedanam) - the knowledge of what is destined to occur (knowledge of future/destined matters)

(noun)

Nominative, neuter, singular of bhāvyārthavedana

bhāvyārthavedana - knowledge of things that are to be, knowledge of destiny

Compound type : tatpuruṣa (bhāvya+artha+vedana)

• bhāvya – to be, future, destined, proper
  adjective (neuter)
  Gerundive/Future Passive Participle
  Formed from root bhū (to be).
  Root: bhū (class 1)
• artha – meaning, purpose, object, wealth, thing
  noun (masculine)
• vedana – knowledge, knowing, perception, feeling
  noun (neuter)
  From root vid (to know).
  Root: vid (class 2)

Note: It could also be accusative singular. Nominative fits 'is' bhavati.

भवति (bhavati) - comes into existence, happens (becomes, is, comes into existence)

(verb)

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

present active

Present tense, 3rd person singular, parasmaipada.

Root: bhū (class 1)

अन्यत् (anyat) - anything else (other, another)

(pronoun)

Nominative, neuter, singular of anya

anya - other, different, another

Note: Here, nominative singular, neuter.

अपूर्वम् (apūrvam) - entirely unprecedented (unprecedented, not seen before, new)

(adjective)

Nominative, neuter, singular of apūrva

apūrva - unprecedented, new, not previously existing, primeval

Compound type : nañ-tatpuruṣa (a+pūrva)

• a – not, un-, in-
  indeclinable
  negative particle
• pūrva – former, previous, eastern, before
  adjective (masculine)

Note: Modifies anyat.

तु (tu) - yet (but, on the other hand, indeed)

(indeclinable)

न (na) - not (not, no)

(indeclinable)

किंचन (kiṁcana) - anything (with na, 'nothing') (anything, something)

(indeclinable)

Combination of interrogative pronoun kim and particle cana.

Compound type : avyayībhāva (kim+cana)

• kim – what?, which?, whether
  pronoun/indeclinable (neuter)
  Interrogative pronoun/particle.
• cana – a particle implying indefiniteness or universality (with na, 'any')
  indeclinable

Note: With na, it means 'nothing'.

कदाचन (kadācana) - ever (with na, 'never') (ever, at any time)

(indeclinable)

Combination of interrogative adverb kadā and particle cana.

Compound type : avyayībhāva (kadā+cana)

• kadā – when?
  indeclinable
  Interrogative adverb of time.
• cana – a particle implying indefiniteness or universality (with na, 'any')
  indeclinable

Note: With na, it means 'never'.