योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-139, verse-56

मेघा इवातिघनघुंघुमघोषभीमा वीचीचयाः कनकपत्तनविद्युतोऽमी ।
व्योम्नि भ्रमन्ति गजवाजिमृगेन्द्रनागवृक्षाद्रिकाननमहीतलतुल्यदेहाः ॥ ५६ ॥

meghā ivātighanaghuṃghumaghoṣabhīmā vīcīcayāḥ kanakapattanavidyuto'mī ,
vyomni bhramanti gajavājimṛgendranāgavṛkṣādrikānanamahītalatulyadehāḥ 56

56. meghāḥ iva atighanaghuṃghumaghoṣabhīmāḥ
vīcīcayāḥ kanakapattravidyutaḥ
amī vyomni bhramanti
gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadehāḥ

56. amī vīcīcayāḥ meghāḥ iva
atighanaghuṃghumaghoṣabhīmāḥ kanakapattravidyutaḥ
gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadehāḥ
vyomni bhramanti

56. These masses of waves wander in the sky. They are terrifying with intensely dense, rumbling sounds, just like (storm) clouds, and they gleam like lightning over golden cities. Their forms are vast, resembling elephants, horses, lions, nāgas (serpents), trees, mountains, forests, and even the surface of the earth itself.

Words meanings summery:

• मेघाः (meghāḥ) - clouds

• इव (iva) - as if, like

• अतिघनघुंघुमघोषभीमाः (atighanaghuṁghumaghoṣabhīmāḥ) - terrible with extremely dense rumbling sounds

• वीचीचयाः (vīcīcayāḥ) - masses of waves, collections of waves

• कनकपत्त्रविद्युतः (kanakapattravidyutaḥ) - like lightning of golden cities

• अमी (amī) - these

• व्योम्नि (vyomni) - in the sky, in space

• भ्रमन्ति (bhramanti) - wander, roam, move about

• गजवाजिमृगेन्द्रनागवृक्षाद्रिकननमहीतलतुल्यदेहाः (gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadehāḥ) - having bodies resembling elephants, horses, lions, nāgas, trees, mountains, forests, and the surface of the earth

Words meanings and morphology

मेघाः (meghāḥ) - clouds

(noun)

Nominative, masculine, plural of megha

megha - cloud

इव (iva) - as if, like

(indeclinable)

अतिघनघुंघुमघोषभीमाः (atighanaghuṁghumaghoṣabhīmāḥ) - terrible with extremely dense rumbling sounds

(adjective)

Nominative, masculine, plural of atighanaghuṃghumaghoṣabhīma

atighanaghuṁghumaghoṣabhīma - terrible from very dense, rumbling sounds

Compound type : bahuvrīhi (ati+ghana+ghuṃghuma+ghoṣa+bhīma)

• ati – extremely, excessively
  indeclinable
• ghana – dense, thick, intense
  adjective
• ghuṃghuma – rumbling, roaring sound
  noun (masculine)
• ghoṣa – sound, noise, roar
  noun (masculine)
• bhīma – terrible, dreadful, formidable
  adjective

वीचीचयाः (vīcīcayāḥ) - masses of waves, collections of waves

(noun)

Nominative, masculine, plural of vīcīcaya

vīcīcaya - mass/collection of waves

Compound type : tatpuruṣa (vīcī+caya)

• vīcī – wave
  noun (feminine)
• caya – heap, pile, collection, mass
  noun (masculine)

कनकपत्त्रविद्युतः (kanakapattravidyutaḥ) - like lightning of golden cities

(noun)

Nominative, feminine, plural of kanakapattravidyut

kanakapattravidyut - lightning of golden cities

Compound type : tatpuruṣa (kanaka+pattana+vidyut)

• kanaka – gold, golden
  noun (neuter)
• pattana – city, town
  noun (neuter)
• vidyut – lightning
  noun (feminine)

अमी (amī) - these

(pronoun)

Nominative, masculine, plural of adas

adas - this, that (demonstrative pronoun, referring to what is near or present)

व्योम्नि (vyomni) - in the sky, in space

(noun)

Locative, neuter, singular of vyoman

vyoman - sky, atmosphere, space

भ्रमन्ति (bhramanti) - wander, roam, move about

(verb)

3rd person , plural, active, present indicative (laṭ) of bhram

Root: bhram (class 1)

गजवाजिमृगेन्द्रनागवृक्षाद्रिकननमहीतलतुल्यदेहाः (gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadehāḥ) - having bodies resembling elephants, horses, lions, nāgas, trees, mountains, forests, and the surface of the earth

(adjective)

Nominative, masculine, plural of gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadeha

gajavājimṛgendranāgavṛkṣādrikananamahītalatulyadeha - having bodies similar to elephants, horses, lions, serpents, trees, mountains, forests, and the surface of the earth

Compound type : bahuvrīhi (gaja+vāji+mṛgendra+nāga+vṛkṣa+adri+kānana+mahītala+tulya+deha)

• gaja – elephant
  noun (masculine)
• vāji – horse
  noun (masculine)
• mṛgendra – lion (king of beasts)
  noun (masculine)
• nāga – serpent, snake (often mythical divine serpents)
  noun (masculine)
• vṛkṣa – tree
  noun (masculine)
• adri – mountain
  noun (masculine)
• kānana – forest, grove
  noun (neuter)
• mahītala – surface of the earth, ground
  noun (neuter)
• tulya – equal, similar, resembling
  adjective
• deha – body, form, figure
  noun (masculine)