योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-18, verse-48

श्रृणु तावदिदानीं त्वं कथ्यमानमिदं मया ।
राघव ज्ञानविस्तारं बुद्धिसारतरान्तरम् ॥ ४८ ॥

śrṛṇu tāvadidānīṃ tvaṃ kathyamānamidaṃ mayā ,
rāghava jñānavistāraṃ buddhisāratarāntaram 48

48. śṛṇu tāvat idānīm tvam kathyamānam idam mayā
rāghava jñānavistāram buddhīsāratarāntaram

48. rāghava,
tvam idānīm tāvat mayā kathyamānam idam jñānavistāram buddhīsāratarāntaram śṛṇu

48. O Rāghava, listen now, for a while, to this which is being told by me—this expansion of knowledge (jñāna) whose inner essence is the highest wisdom.

Words meanings summery:

• शृणु (śṛṇu) - listen, hear

• तावत् (tāvat) - for a while, meanwhile, so long, so much

• इदानीम् (idānīm) - now, at this time

• त्वम् (tvam) - you

• कथ्यमानम् (kathyamānam) - being told, being narrated

• इदम् (idam) - this

• मया (mayā) - by me

• राघव (rāghava) - O Rama (O Rāghava (descendant of Raghu, a name for Rama))

• ज्ञानविस्तारम् (jñānavistāram) - the expansion of knowledge (jñāna)

• बुद्धीसारतरान्तरम् (buddhīsāratarāntaram) - whose inner essence is the highest wisdom/intellect

Words meanings and morphology

शृणु (śṛṇu) - listen, hear

(verb)

2nd person , singular, active, imperative (loṭ) of śṛ

Root: śru (class 5)

तावत् (tāvat) - for a while, meanwhile, so long, so much

(indeclinable)

इदानीम् (idānīm) - now, at this time

(indeclinable)

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (singular)

कथ्यमानम् (kathyamānam) - being told, being narrated

(participle)

Accusative, neuter, singular of kathyamāna

kathyamāna - being told, being related, being spoken

Present Passive Participle

Derived from root 'kath' (to tell) in the passive voice with suffix -māna.

Root: kath (class 10)

इदम् (idam) - this

(pronoun)

Accusative, neuter, singular of idam

idam - this, this here

मया (mayā) - by me

(pronoun)

Instrumental, singular of asmad

asmad - I, me (first person pronoun)

राघव (rāghava) - O Rama (O Rāghava (descendant of Raghu, a name for Rama))

(proper noun)

Vocative, masculine, singular of rāghava

rāghava - descendant of Raghu, a name for Rama

ज्ञानविस्तारम् (jñānavistāram) - the expansion of knowledge (jñāna)

(noun)

Accusative, neuter, singular of jñānavistāra

jñānavistāra - expansion of knowledge (jñāna), detailed knowledge

Compound type : ṣaṣṭhī tatpuruṣa (jñāna+vistāra)

• jñāna – knowledge, wisdom, understanding
  noun (neuter)
  Root: jñā (class 9)
• vistāra – expansion, diffusion, proliferation, detail
  noun (masculine)
  Prefix: vi
  Root: stṛ (class 5)

बुद्धीसारतरान्तरम् (buddhīsāratarāntaram) - whose inner essence is the highest wisdom/intellect

(adjective)

Accusative, neuter, singular of buddhīsāratarāntara

buddhīsāratarāntara - whose inner essence is of superior intellect; whose essential part is the best wisdom

Compound type : bahuvrīhi (buddhi+sāratara+antara)

• buddhi – intellect, understanding, wisdom, perception
  noun (feminine)
  Root: budh (class 1)
• sāratara – more essential, most excellent, superior in essence
  adjective (masculine)
  Comparative form of 'sāra' (essence, core) using 'tara' suffix.
• antara – interior, essence, core, inner part
  noun (neuter)