योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-33, verse-48

घनप्रवाहयाऽकस्माच्चित्तेहा सैव वर्धते ।
य एवोच्चैःस्वरस्तन्त्र्याः स एवाक्रामति श्रुतिम् ॥ ४८ ॥

ghanapravāhayā'kasmāccittehā saiva vardhate ,
ya evoccaiḥsvarastantryāḥ sa evākrāmati śrutim 48

48. ghana-pravāhayā akasmāt cittehā sā eva vardhate yaḥ
eva uccaiḥ svaraḥ tantryāḥ saḥ eva ākramati śrutim

48. cittehā akasmāt ghana-pravāhayā sā eva vardhate yaḥ
eva tantryāḥ uccaiḥ svaraḥ saḥ eva śrutim ākramati

48. Mental desire (cittehā) suddenly intensifies through a continuous, dense current, much like a high-pitched note from a string instrument completely pervades the sense of hearing.

Words meanings summery:

• घन-प्रवाहया (ghana-pravāhayā) - by a dense flow, by a thick current

• अकस्मात् (akasmāt) - suddenly, unexpectedly, by chance

• चित्तेहा (cittehā) - mental desire, activity of the mind

• सा (sā) - that (feminine singular)

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

• वर्धते (vardhate) - increases, grows, thrives

• यः (yaḥ) - who, which, just as

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

• उच्चैः (uccaiḥ) - high, loud, above

• स्वरः (svaraḥ) - sound, note, tone, voice

• तन्त्र्याः (tantryāḥ) - of a string (of an instrument)

• सः (saḥ) - he, that (masculine singular nominative)

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

• आक्रमति (ākramati) - pervades, occupies, overcomes, assaults

• श्रुतिम् (śrutim) - the ear, hearing, a heard sound, a traditional text

Words meanings and morphology

घन-प्रवाहया (ghana-pravāhayā) - by a dense flow, by a thick current

(noun)

Instrumental, feminine, singular of ghana-pravāha

ghana-pravāha - dense flow, thick current

Compound type : tatpuruṣa (ghana+pravāha)

• ghana – dense, thick, solid, cloud
  adjective
• pravāha – flow, current, stream, course
  noun (masculine)
  Derived from root `vah` (to carry) with prefix `pra-`.
  Prefix: pra
  Root: vah (class 1)

अकस्मात् (akasmāt) - suddenly, unexpectedly, by chance

(indeclinable)

चित्तेहा (cittehā) - mental desire, activity of the mind

(noun)

Nominative, feminine, singular of cittehā

cittehā - desire of the mind, mental activity, mental effort

Compound type : tatpuruṣa (citta+īhā)

• citta – mind, thought, consciousness, heart
  noun (neuter)
  Past Passive Participle
  From root `cit` (to perceive, know).
  Root: cit (class 1)
• īhā – desire, effort, activity, exertion
  noun (feminine)
  Root: īh (class 1)

सा (sā) - that (feminine singular)

(pronoun)

Nominative, feminine, singular of tad

tad - that, she, it

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

(indeclinable)

वर्धते (vardhate) - increases, grows, thrives

(verb)

3rd person , singular, middle, present indicative (laṭ) of vṛdh

Root: vṛdh (class 1)

यः (yaḥ) - who, which, just as

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what

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

(indeclinable)

उच्चैः (uccaiḥ) - high, loud, above

(indeclinable)

स्वरः (svaraḥ) - sound, note, tone, voice

(noun)

Nominative, masculine, singular of svara

svara - sound, note, tone, voice, vowel

तन्त्र्याः (tantryāḥ) - of a string (of an instrument)

(noun)

Genitive, feminine, singular of tantrī

tantrī - string (of a musical instrument), thread

सः (saḥ) - he, that (masculine singular nominative)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, it

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

(indeclinable)

आक्रमति (ākramati) - pervades, occupies, overcomes, assaults

(verb)

3rd person , singular, active, present indicative (laṭ) of kram

Prefix: ā

Root: kram (class 1)

श्रुतिम् (śrutim) - the ear, hearing, a heard sound, a traditional text

(noun)

Accusative, feminine, singular of śruti

śruti - hearing, the ear, sound, traditional text (Veda)

Root: śru (class 1)