योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-78, verse-20

शरद्व्योमसमाभ्गेगैर्वलद्भिर्बुद्गुदेक्षणैः ।
पश्यन्निव नदीधारान्भेघानाताम्रपूरकान् ॥ २० ॥

śaradvyomasamābhgegairvaladbhirbudgudekṣaṇaiḥ ,
paśyanniva nadīdhārānbheghānātāmrapūrakān 20

20. śaradv-vyoma-samābhgegaiḥ valadbhiḥ budgude-kṣaṇaiḥ
paśyan iva nadīdhārān bheghān ātāmrapūrakān

20. (implied subject) paśyan iva nadīdhārān bheghān ātāmrapūrakān
śaradv-vyoma-samābhgegaiḥ valadbhiḥ budgude-kṣaṇaiḥ

20. As if seeing the river currents and the clouds—which were filling with a coppery hue—with its vast expanse resembling the autumn sky, with its churning movements, and with its bubble-like eyes.

Words meanings summery:

• शरद्व्-व्योम-समाभ्गेगैः (śaradv-vyoma-samābhgegaiḥ) - by the vastness or form of the ocean/river, which resembles the clear, vast autumn sky. (by those having an expanse/enjoyment like the autumn sky; by those with a full resemblance to the autumn sky.)

• वलद्भिः (valadbhiḥ) - by the churning movements or waves of the water body. (by those moving, turning, revolving.)

• बुद्गुदे-क्षणैः (budgude-kṣaṇaiḥ) - by the ocean's/river's eyes, which are like bubbles (referring to foam or actual bubbles). (by those whose eyes are like bubbles; with bubble-like eyes.)

• पश्यन् (paśyan) - seeing, while seeing.

• इव (iva) - as if, like.

• नदीधारान् (nadīdhārān) - river currents, river streams.

• भेघान् (bheghān) - clouds that are being observed by the personified ocean/river. (clouds (likely a typo for `meghān`).)

• आताम्रपूरकान् (ātāmrapūrakān) - describes the clouds as taking on a reddish or coppery hue, possibly from the sun or a natural phenomenon. (filling with reddish/coppery color; making reddish.)

Words meanings and morphology

शरद्व्-व्योम-समाभ्गेगैः (śaradv-vyoma-samābhgegaiḥ) - by the vastness or form of the ocean/river, which resembles the clear, vast autumn sky. (by those having an expanse/enjoyment like the autumn sky; by those with a full resemblance to the autumn sky.)

(adjective)

Instrumental, masculine, plural of śaradv-vyoma-samābhgega

śaradv-vyoma-samābhgega - full resemblance/expanse of the autumn sky.

Compound type : bahuvrīhi (śarat+vyoman+sama+ābhoga)

• śarat – autumn
  noun (feminine)
• vyoman – sky, atmosphere, heaven
  noun (neuter)
• sama – equal, like, same
  adjective
• ābhoga – fullness, expanse, enjoyment, embrace
  noun (masculine)
  Prefix: ā
  Root: bhuj (class 7)

वलद्भिः (valadbhiḥ) - by the churning movements or waves of the water body. (by those moving, turning, revolving.)

(participle)

Instrumental, masculine, plural of valat

valat - moving, turning, revolving.

present active participle

Derived from the root `val` (गतिचलनयोः - to move, to turn), class 1P.

Root: val (class 1)

बुद्गुदे-क्षणैः (budgude-kṣaṇaiḥ) - by the ocean's/river's eyes, which are like bubbles (referring to foam or actual bubbles). (by those whose eyes are like bubbles; with bubble-like eyes.)

(adjective)

Instrumental, masculine, plural of budgude-kṣaṇa

budgude-kṣaṇa - bubble-eyed, having eyes like bubbles.

Compound type : bahuvrīhi (budguda+īkṣaṇa)

• budguda – bubble
  noun (masculine)
• īkṣaṇa – eye, seeing, looking
  noun (neuter)
  Derived from root `īkṣ` (दर्शने - to see).
  Root: īkṣ (class 1)

पश्यन् (paśyan) - seeing, while seeing.

(participle)

Nominative, masculine, singular of paśyat

paśyat - one who sees, seeing.

present active participle

Irregular present active participle of the root `dṛś` (प्रेक्षणे - to see), class 1P.

Root: dṛś (class 1)

इव (iva) - as if, like.

(indeclinable)

नदीधारान् (nadīdhārān) - river currents, river streams.

(noun)

Accusative, feminine, plural of nadī-dhārā

nadī-dhārā - river current, stream of a river.

Compound type : tatpuruṣa (nadī+dhārā)

• nadī – river
  noun (feminine)
• dhārā – stream, current, flow, cascade
  noun (feminine)
  Derived from root `dhṛ` (धारणपोषणयोः - to hold, bear).
  Root: dhṛ (class 1)

भेघान् (bheghān) - clouds that are being observed by the personified ocean/river. (clouds (likely a typo for `meghān`).)

(noun)

Accusative, masculine, plural of bhegha

bhegha - clouds (assuming typo for `megha`); a type of drum.

आताम्रपूरकान् (ātāmrapūrakān) - describes the clouds as taking on a reddish or coppery hue, possibly from the sun or a natural phenomenon. (filling with reddish/coppery color; making reddish.)

(adjective)

Accusative, masculine, plural of ātāmrapūraka

ātāmrapūraka - one who fills with reddish color, making reddish.

Compound type : tatpuruṣa (ātāmra+pūraka)

• ātāmra – reddish, coppery red.
  adjective
  Prefix: ā
• pūraka – filler, completer, one who fills or causes to fill.
  adjective/noun (masculine)
  agent noun/adjective
  Derived from root `pṛ` (पूरणे - to fill) with the suffix `ṇaka`.
  Root: pṛ (class 3)