योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-77, verse-47

ततो नदीप्रवाहोग्रजलपातैकपातया ।
सप्तद्वीपमहीपीठसममेदुरमेघया ॥ ४७ ॥

tato nadīpravāhograjalapātaikapātayā ,
saptadvīpamahīpīṭhasamamedurameghayā 47

47. tataḥ nadī-pravāha-ugra-jala-pāta-eka-pātayā
sapta-dvīpa-mahī-pīṭha-sama-medura-meghayā

47. tataḥ nadī-pravāha-ugra-jala-pāta-eka-pātayā (vṛṣṭyā),
sapta-dvīpa-mahī-pīṭha-sama-medura-meghayā (ca) (vavṛdhe)

47. Then, the water descended in a single, mighty deluge, fierce as a river's current; this happened by means of clouds (megha) that were swollen and dense like the vast expanse of the earth with its seven continents.

Words meanings summery:

• ततः (tataḥ) - then, thereafter, from that

• नदी-प्रवाह-उग्र-जल-पात-एक-पातया (nadī-pravāha-ugra-jala-pāta-eka-pātayā) - describes the intense, singular downpour of water (by a single fall (or descent) of water, fierce like a river's current)

• सप्त-द्वीप-मही-पीठ-सम-मेदुर-मेघया (sapta-dvīpa-mahī-pīṭha-sama-medura-meghayā) - describes the immense, widespread, and heavy clouds responsible for the deluge (by clouds that are dense and swollen like the platform of the earth with its seven continents)

Words meanings and morphology

ततः (tataḥ) - then, thereafter, from that

(indeclinable)

नदी-प्रवाह-उग्र-जल-पात-एक-पातया (nadī-pravāha-ugra-jala-pāta-eka-pātayā) - describes the intense, singular downpour of water (by a single fall (or descent) of water, fierce like a river's current)

(adjective)

Instrumental, feminine, singular of nadī-pravāha-ugra-jala-pāta-eka-pātā

nadī-pravāha-ugra-jala-pāta-eka-pātā - a single fall of water, fierce like a river's current

Compound type : bahuvrīhi (nadī+pravāha+ugra+jala+pāta+eka+pāta)

• nadī – river
  noun (feminine)
• pravāha – current, stream, flow
  noun (masculine)
  pra + vah (to carry, flow)
  Prefix: pra
  Root: vah (class 1)
• ugra – fierce, terrible, powerful, violent
  adjective
• jala – water
  noun (neuter)
• pāta – fall, descent, falling
  noun (masculine)
  from pat (to fall)
  Root: pat (class 1)
• eka – one, single, unique
  adjective
• pāta – fall, descent, falling
  noun (masculine)
  from pat (to fall)
  Root: pat (class 1)

सप्त-द्वीप-मही-पीठ-सम-मेदुर-मेघया (sapta-dvīpa-mahī-pīṭha-sama-medura-meghayā) - describes the immense, widespread, and heavy clouds responsible for the deluge (by clouds that are dense and swollen like the platform of the earth with its seven continents)

(adjective)

Instrumental, feminine, singular of sapta-dvīpa-mahī-pīṭha-sama-medura-meghā

sapta-dvīpa-mahī-pīṭha-sama-medura-meghā - clouds dense/swollen like the platform of the earth with its seven continents

Compound type : bahuvrīhi (sapta+dvīpa+mahī+pīṭha+sama+medura+meghā)

• sapta – seven
  numeral
• dvīpa – island, continent (specifically the seven continents/dvīpas of ancient Indian cosmology)
  noun (masculine)
• mahī – earth, ground
  noun (feminine)
• pīṭha – seat, stool, platform, base
  noun (neuter)
• sama – equal, similar, like
  adjective
• medura – fat, plump, thick, dense, swollen, moist
  adjective
• meghā – cloud, mass of clouds
  noun (feminine)
  from mih (to sprinkle, urinate)
  Root: mih (class 1)