योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-86, verse-36

तदानुभूतं वपुषि महाविश्वगणात्मनि ।
एकत्र कल्पविक्षुब्धपुष्करावर्तमन्थरम् ॥ ३६ ॥

tadānubhūtaṃ vapuṣi mahāviśvagaṇātmani ,
ekatra kalpavikṣubdhapuṣkarāvartamantharam 36

36. tadā anubhūtam vapuṣi mahāviśvagaṇātmani
ekatra kalpavikṣubdhapuṣkarāvartamantharam

36. tadā (mayā) mahāviśvagaṇātmani vapuṣi anubhūtam
ekatra kalpavikṣubdhapuṣkarāvartamantharam

36. Then, I experienced it within a body (vapuṣi) that embodied the very essence (ātman) of countless great universes (mahāviśvagaṇa). In one part (ekatra), this form was ponderous (mantharam), like the Puṣkarāvarta clouds agitated (vikṣubdha) during the dissolution of a cosmic age (kalpa).

Words meanings summery:

• तदा (tadā) - then, at that time

• अनुभूतम् (anubhūtam) - experienced, perceived, felt

• वपुषि (vapuṣi) - in the body, in the form

• महाविश्वगणात्मनि (mahāviśvagaṇātmani) - in the essence/self of a multitude of great universes

• एकत्र (ekatra) - in one place, on one side, at one point

• कल्पविक्षुब्धपुष्करावर्तमन्थरम् (kalpavikṣubdhapuṣkarāvartamantharam) - ponderous/majestic like the Puṣkarāvarta clouds agitated at the end of a cosmic age (kalpa)

Words meanings and morphology

तदा (tadā) - then, at that time

(indeclinable)

अनुभूतम् (anubhūtam) - experienced, perceived, felt

(adjective)

Accusative, neuter, singular of anubhūta

anubhūta - experienced, perceived, felt, known

Past Passive Participle

From root 'bhū' with prefix 'anu'

Prefix: anu

Root: bhū (class 1)

वपुषि (vapuṣi) - in the body, in the form

(noun)

Locative, neuter, singular of vapus

vapus - body, form, figure

महाविश्वगणात्मनि (mahāviśvagaṇātmani) - in the essence/self of a multitude of great universes

(noun)

Locative, masculine, singular of mahāviśvagaṇātman

mahāviśvagaṇātman - the essence or self of a multitude of great universes

Compound type : Tatpuruṣa (mahā+viśvagaṇa+ātman)

• mahā – great, mighty, vast
  adjective
• viśvagaṇa – multitude/host of universes
  noun (masculine)
• ātman – self, soul, spirit, essence (ātman)
  noun (masculine)

एकत्र (ekatra) - in one place, on one side, at one point

(indeclinable)

कल्पविक्षुब्धपुष्करावर्तमन्थरम् (kalpavikṣubdhapuṣkarāvartamantharam) - ponderous/majestic like the Puṣkarāvarta clouds agitated at the end of a cosmic age (kalpa)

(adjective)

Nominative, neuter, singular of kalpavikṣubdhapuṣkarāvartamanthara

kalpavikṣubdhapuṣkarāvartamanthara - ponderous/majestic like the Puṣkarāvarta clouds agitated at the end of a cosmic age (kalpa)

Compound type : Bahuvrīhi (kalpa+vikṣubdha+puṣkarāvarta+manthara)

• kalpa – a cosmic age, aeon (kalpa)
  noun (masculine)
• vikṣubdha – agitated, disturbed, troubled
  adjective (neuter)
  Past Passive Participle
  From root 'kṣubh' with prefix 'vi'
  Prefix: vi
  Root: kṣubh (class 1)
• puṣkarāvarta – Puṣkarāvarta clouds (mythical clouds causing deluge)
  noun (masculine)
• manthara – slow, sluggish, ponderous, majestic
  adjective (neuter)

Note: Modifies the implied object 'it' or 'form'