योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-115, verse-18

वातायनोदरगवाक्षकवाटकक्षाद्वाराननैरिह पुराण्युदिते पठन्ति ।
श्वभ्राभ्रकन्दरदरीवनवेणुरन्ध्रवर्गेण मन्दर इवामृतसिन्धुमिन्दुम् ॥ १८ ॥

vātāyanodaragavākṣakavāṭakakṣādvārānanairiha purāṇyudite paṭhanti ,
śvabhrābhrakandaradarīvanaveṇurandhravargeṇa mandara ivāmṛtasindhumindum 18

18. vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānanaiḥ
iha purāṇāni udite paṭhanti
śvabhra-abhra-kandara-darī-vana-veṇu-randhra-vargeṇa
mandaraḥ iva amṛta-sindhum indum

18. iha purāṇāni udite vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānanaiḥ paṭhanti.
(tathā) śvabhra-abhra-kandara-darī-vana-veṇu-randhra-vargeṇa mandaraḥ iva amṛta-sindhum indum (paṭhanti).

18. Here, when the sun rises, people recite the Purāṇas through the openings of large windows, inner windows, small windows, door-panels, and chamber doors. This recitation, echoing through pits, clouds, caves, ravines, forests, and bamboo holes, is like Mount Mandara churning the ocean of nectar to produce the moon.

Words meanings summery:

• वातायन-उदर-गवाक्ष-कवाट-कक्षा-द्वार-आननैः (vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānanaiḥ) - through the openings of large windows, inner windows, small windows, door-panels, and chamber doors (through the mouths/openings of windows, interior windows, small windows, door-panels, and chamber doors)

• इह (iha) - here (here, in this world, at this time)

• पुराणानि (purāṇāni) - the Purāṇas (ancient stories, old (neuter nominative/accusative plural))

• उदिते (udite) - when (the sun) has risen (risen, appeared, spoken; (locative) when risen, when appeared)

• पठन्ति (paṭhanti) - they recite (they read, they recite, they study)

• श्वभ्र-अभ्र-कन्दर-दरी-वन-वेणु-रन्ध्र-वर्गेण (śvabhra-abhra-kandara-darī-vana-veṇu-randhra-vargeṇa) - through groups of pits, clouds, caves, ravines, forests, and bamboo holes (by the group of pits, clouds, caves, ravines, forests, and bamboo holes)

• मन्दरः (mandaraḥ) - Mount Mandara (the mythical mountain used to churn the ocean) (Mount Mandara (a mythical mountain), slow, dull)

• इव (iva) - like, as if (like, as if, as, similar to)

• अमृत-सिन्धुम् (amṛta-sindhum) - the ocean of nectar (the ocean of nectar, the sea of immortality)

• इन्दुम् (indum) - the moon (the moon, a drop, camphor)

Words meanings and morphology

वातायन-उदर-गवाक्ष-कवाट-कक्षा-द्वार-आननैः (vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānanaiḥ) - through the openings of large windows, inner windows, small windows, door-panels, and chamber doors (through the mouths/openings of windows, interior windows, small windows, door-panels, and chamber doors)

(noun)

Instrumental, neuter, plural of vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānana

vātāyana-udara-gavākṣa-kavāṭa-kakṣā-dvāra-ānana - mouth/opening of a window, inner window, small window, door-panel, chamber-door

Compound type : dvandva (vātāyana-udara+gavākṣa+kavāṭa+kakṣā-dvāra+ānana)

• vātāyana – window, air-hole
  noun (neuter)
• udara – belly, interior, inside
  noun (neuter)
• gavākṣa – small window, loop-hole, balcony
  noun (masculine)
• kavāṭa – door-panel, shutter
  noun (neuter)
• kakṣā – chamber, room, armpit
  noun (feminine)
• dvāra – door, gate, opening
  noun (neuter)
• ānana – mouth, face, opening
  noun (neuter)

Note: The compound is parsed as 'mouths (openings) associated with windows, etc.'

इह (iha) - here (here, in this world, at this time)

(indeclinable)

पुराणानि (purāṇāni) - the Purāṇas (ancient stories, old (neuter nominative/accusative plural))

(noun)

Accusative, neuter, plural of purāṇa

purāṇa - ancient, old, a class of sacred texts (Purāṇas)

Note: Object of 'paṭhanti'.

उदिते (udite) - when (the sun) has risen (risen, appeared, spoken; (locative) when risen, when appeared)

(adjective)

Locative, neuter, singular of udita

udita - risen, appeared, said, spoken, elevated

Past Passive Participle

From ud-i (to rise).

Prefix: ud

Root: i (class 2)

पठन्ति (paṭhanti) - they recite (they read, they recite, they study)

(verb)

3rd person , plural, active, present (laṭ) of paṭh

Root: paṭh (class 1)

श्वभ्र-अभ्र-कन्दर-दरी-वन-वेणु-रन्ध्र-वर्गेण (śvabhra-abhra-kandara-darī-vana-veṇu-randhra-vargeṇa) - through groups of pits, clouds, caves, ravines, forests, and bamboo holes (by the group of pits, clouds, caves, ravines, forests, and bamboo holes)

(noun)

Instrumental, masculine, singular of śvabhra-abhra-kandara-darī-vana-veṇu-randhra-varga

śvabhra-abhra-kandara-darī-vana-veṇu-randhra-varga - group of pits, clouds, caves, ravines, forests, and bamboo holes

Compound type : tatpuruṣa (śvabhra-abhra-kandara-darī-vana-veṇu-randhra+varga)

• śvabhra – pit, cave, chasm
  noun (neuter)
• abhra – cloud, sky
  noun (neuter)
• kandara – cave, cavern, grotto
  noun (neuter)
• darī – cave, valley, ravine
  noun (feminine)
• vana – forest, wood, grove, water
  noun (neuter)
• veṇu-randhra – bamboo hole
  noun (neuter)
• varga – group, class, multitude, collection
  noun (masculine)

मन्दरः (mandaraḥ) - Mount Mandara (the mythical mountain used to churn the ocean) (Mount Mandara (a mythical mountain), slow, dull)

(proper noun)

Nominative, masculine, singular of mandara

mandara - Mount Mandara (mythical mountain), slow, dull, large

इव (iva) - like, as if (like, as if, as, similar to)

(indeclinable)

अमृत-सिन्धुम् (amṛta-sindhum) - the ocean of nectar (the ocean of nectar, the sea of immortality)

(noun)

Accusative, masculine, singular of amṛta-sindhu

amṛta-sindhu - ocean of nectar, sea of immortality

Compound type : tatpuruṣa (amṛta+sindhu)

• amṛta – nectar, immortality, imperishable
  noun (neuter)
  Negation of mṛta (dead).
  Root: mṛ (class 1)
• sindhu – river, ocean, sea, the Indus River
  noun (masculine)

इन्दुम् (indum) - the moon (the moon, a drop, camphor)

(noun)

Accusative, masculine, singular of indu

indu - moon, drop, camphor, white