योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-71, verse-50

पुस्फोटेव पतन्ती द्यौर्दिशां पतिरवारवैः ।
आवर्तवलनाकाराः केतवः पेतुरम्बरात् ॥ ५० ॥

pusphoṭeva patantī dyaurdiśāṃ patiravāravaiḥ ,
āvartavalanākārāḥ ketavaḥ peturambarāt 50

50. pusphoṭa iva patantī dyauḥ diśām patiḥ avāravaiḥ
āvartavalanākārāḥ ketavaḥ petuḥ ambarāt

50. patantī dyauḥ pusphoṭa iva diśām patiḥ avāravaiḥ
āvartavalanākārāḥ ketavaḥ ambarāt petuḥ

50. The falling sky seemed to explode, and the lord of the directions cried out with boundless roars. Comets, appearing like swirling whirlpools, fell from the heavens.

Words meanings summery:

• पुस्फोट (pusphoṭa) - burst, exploded, broke open

• इव (iva) - like, as, as if

• पतन्ती (patantī) - falling, descending

• द्यौः (dyauḥ) - sky, heaven, atmosphere

• दिशाम् (diśām) - of the directions, of the quarters

• पतिः (patiḥ) - the lord of the quarters (dikpāla), the guardian deity of a direction (lord, master, ruler)

• अवारवैः (avāravaiḥ) - with unhindered sounds, with boundless roars, with incessant noises

• आवर्तवलनाकाराः (āvartavalanākārāḥ) - having the appearance of whirlpools and whirling movements; shaped like turning eddies

• केतवः (ketavaḥ) - comets or fiery meteors (comets, meteors, banners, signs)

• पेतुः (petuḥ) - fell, dropped

• अम्बरात् (ambarāt) - from the sky, from the atmosphere

Words meanings and morphology

पुस्फोट (pusphoṭa) - burst, exploded, broke open

(verb)

3rd person , singular, active, perfect (lit) of sphuṭ

Perfect tense (lit. Laṭ), 3rd person singular

Reduplicated perfect form of the root 'sphuṭ'. 'Pusphoṭa' is a known intensive or prefixed form.

Root: sphuṭ (class 1)

इव (iva) - like, as, as if

(indeclinable)

पतन्ती (patantī) - falling, descending

(adjective)

Nominative, feminine, singular of patat

patat - falling, descending, flying

Present Active Participle (feminine)

Feminine nominative singular of 'patat' (from root 'pat').

Root: pat (class 1)

द्यौः (dyauḥ) - sky, heaven, atmosphere

(noun)

Nominative, feminine, singular of div

div - sky, heaven, day

दिशाम् (diśām) - of the directions, of the quarters

(noun)

Genitive, feminine, plural of diś

diś - direction, quarter, region

पतिः (patiḥ) - the lord of the quarters (dikpāla), the guardian deity of a direction (lord, master, ruler)

(noun)

Nominative, masculine, singular of pati

pati - lord, master, owner, husband, ruler

अवारवैः (avāravaiḥ) - with unhindered sounds, with boundless roars, with incessant noises

(adjective)

Instrumental, masculine, plural of avārava

avārava - unhindered sound, boundless roar, uninterrupted noise

Compound of 'a' (not) and 'vārava' (hindered sound/noise). 'Vārava' from 'vāra' (stopping) and 'rava' (sound).

Compound type : bahuvrīhi (a+vāra+rava)

• a – not, un-, without
  indeclinable
  Negation prefix.
• vāra – stopping, checking, preventing
  noun (masculine)
  From root 'vṛ' (to restrain).
  Root: vṛ (class 5)
• rava – sound, roar, cry, noise
  noun (masculine)
  From root 'ru' (to cry, roar).
  Root: ru (class 2)

आवर्तवलनाकाराः (āvartavalanākārāḥ) - having the appearance of whirlpools and whirling movements; shaped like turning eddies

(adjective)

Nominative, masculine, plural of āvartavalanākāra

āvartavalanākāra - having the form/appearance of swirling whirlpools

Compound of 'āvarta' (whirlpool), 'valana' (revolving/whirling), and 'ākāra' (form/appearance).

Compound type : bahuvrīhi (āvarta+valana+ākāra)

• āvarta – whirlpool, eddy, circle, turning round
  noun (masculine)
  From root 'vṛt' with prefix 'ā'.
  Prefix: ā
  Root: vṛt (class 1)
• valana – rolling, whirling, turning, moving to and fro
  noun (neuter)
  From root 'val' (to turn, move).
  Root: val (class 1)
• ākāra – form, shape, appearance, resemblance
  noun (masculine)
  Prefix: ā

केतवः (ketavaḥ) - comets or fiery meteors (comets, meteors, banners, signs)

(noun)

Nominative, masculine, plural of ketu

ketu - comet, meteor, banner, flag, sign, mark

पेतुः (petuḥ) - fell, dropped

(verb)

3rd person , plural, active, perfect (lit) of pat

Perfect tense (lit. Laṭ), 3rd person plural

Reduplicated perfect form of the root 'pat'.

Root: pat (class 1)

अम्बरात् (ambarāt) - from the sky, from the atmosphere

(noun)

Ablative, neuter, singular of ambara

ambara - sky, atmosphere, heaven, garment

Note: Source of falling.