योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-86, verse-57

प्राणानिलस्तथा स्पन्दं विशत्वद्य प्रभञ्जनम् ।
विशन्त्वाकाशकुहरं शब्दश्रवणशक्तयः ॥ ५७ ॥

prāṇānilastathā spandaṃ viśatvadya prabhañjanam ,
viśantvākāśakuharaṃ śabdaśravaṇaśaktayaḥ 57

57. prāṇānilaḥ tathā spandam viśatu adya prabhañjanam
viśantu ākāśakuharam śabdaśravaṇaśaktayaḥ

57. tathā prāṇānilaḥ spandam prabhañjanam adya
viśatu śabdaśravaṇaśaktayaḥ ākāśakuharam viśantu

57. Similarly, let the vital breath (prāṇa-anila) and its pulsation merge into the great wind. Let the faculties (śakti) of hearing sounds merge into the cavity of space.

Words meanings summery:

• प्राणानिलः (prāṇānilaḥ) - life-wind, vital breath-wind

• तथा (tathā) - thus, so, similarly, in that manner

• स्पन्दम् (spandam) - vibration, tremor, pulsation, movement

• विशतु (viśatu) - let it enter, let it penetrate, let it merge

• अद्य (adya) - today, now, at present

• प्रभञ्जनम् (prabhañjanam) - destroyer, great wind, hurricane

• विशन्तु (viśantu) - let them enter, let them penetrate, let them merge

• आकाशकुहरम् (ākāśakuharam) - the cavity of space, the hollow of the sky

• शब्दश्रवणशक्तयः (śabdaśravaṇaśaktayaḥ) - powers of hearing sounds, faculties of audition

Words meanings and morphology

प्राणानिलः (prāṇānilaḥ) - life-wind, vital breath-wind

(noun)

Nominative, masculine, singular of prāṇānila

prāṇānila - life-wind, vital breath-wind

Compound type : tatpuruṣa (prāṇa+anila)

• prāṇa – life, breath, vital air
  noun (masculine)
  Root: an (class 2)
• anila – wind, air
  noun (masculine)
  Root: an (class 2)

तथा (tathā) - thus, so, similarly, in that manner

(indeclinable)

स्पन्दम् (spandam) - vibration, tremor, pulsation, movement

(noun)

Accusative, masculine, singular of spanda

spanda - vibration, tremor, pulsation, movement

derived from root √spand

Root: spand (class 1)

Note: Could be neuter, but masculine is also common. Grammatically fits accusative singular of either.

विशतु (viśatu) - let it enter, let it penetrate, let it merge

(verb)

3rd person , singular, active, imperative (loṭ) of viś

imperative

3rd person singular imperative active

Root: viś (class 6)

अद्य (adya) - today, now, at present

(indeclinable)

प्रभञ्जनम् (prabhañjanam) - destroyer, great wind, hurricane

(noun)

Accusative, masculine, singular of prabhañjana

prabhañjana - destroyer, great wind, hurricane

from pra-√bhañj (to break forth, destroy)

Prefix: pra

Root: bhañj (class 7)

Note: Could be neuter accusative singular as well. Given prāṇānila (masc), prabhañjana (masc) as the object of merging is plausible.

विशन्तु (viśantu) - let them enter, let them penetrate, let them merge

(verb)

3rd person , plural, active, imperative (loṭ) of viś

imperative

3rd person plural imperative active

Root: viś (class 6)

आकाशकुहरम् (ākāśakuharam) - the cavity of space, the hollow of the sky

(noun)

Accusative, neuter, singular of ākāśakuhara

ākāśakuhara - cavity of space, hollow of the sky

Compound type : tatpuruṣa (ākāśa+kuhara)

• ākāśa – space, ether, sky
  noun (masculine)
  Prefix: ā
  Root: kāś (class 1)
• kuhara – cavity, hollow, cave
  noun (neuter)

शब्दश्रवणशक्तयः (śabdaśravaṇaśaktayaḥ) - powers of hearing sounds, faculties of audition

(noun)

Nominative, feminine, plural of śabdaśravaṇaśakti

śabdaśravaṇaśakti - powers of hearing sounds, faculties of audition

Compound type : tatpuruṣa (śabda+śravaṇa+śakti)

• śabda – sound, word
  noun (masculine)
  Root: śabd (class 1)
• śravaṇa – hearing, listening, ear
  noun (neuter)
  nominalized form of root śru
  Root: śru (class 5)
• śakti – power, faculty, energy, strength (śakti)
  noun (feminine)
  Root: śak (class 5)

Note: Feminine nominative plural of śabdaśravaṇaśakti