योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-122, verse-19

अशङ्कितोत्पतद्वारिपूरपातपटावृताः ।
उत्पातपातनिपतद्वितानकवृता इव ॥ १९ ॥

aśaṅkitotpatadvāripūrapātapaṭāvṛtāḥ ,
utpātapātanipatadvitānakavṛtā iva 19

19. aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛtāḥ
utpāta-pāta-nipatat-vitānaka-vṛtāḥ iva

19. aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛtāḥ
iva utpāta-pāta-nipatat-vitānaka-vṛtāḥ

19. They were enveloped by an unexpected, rising, curtain-like deluge of water, appearing as though covered by a canopy falling in a catastrophic event.

Words meanings summery:

• अशङ्कित-उत्पतत्-वारि-पूर-पात-पट-आवृताः (aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛtāḥ) - enveloped by an unexpected, rising, curtain-like deluge of water (covered by a sudden curtain of falling, rising masses of water)

• उत्पात-पात-निपतत्-वितानक-वृताः (utpāta-pāta-nipatat-vitānaka-vṛtāḥ) - covered as if by a canopy falling catastrophically (covered by an awning falling down calamitously)

• इव (iva) - as if (like, as if, as)

Words meanings and morphology

अशङ्कित-उत्पतत्-वारि-पूर-पात-पट-आवृताः (aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛtāḥ) - enveloped by an unexpected, rising, curtain-like deluge of water (covered by a sudden curtain of falling, rising masses of water)

(adjective)

Nominative, masculine, plural of aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛta

aśaṅkita-utpatat-vāri-pūra-pāta-paṭa-āvṛta - covered by a sudden, rising, curtain-like downpour of water

Past Passive Participle

From ā-vṛ (to cover) + kta suffix.

Compound type : tatpuruṣa (aśaṅkita+utpatat+vāri+pūra+pāta+paṭa+āvṛta)

• aśaṅkita – unexpected, sudden, not feared
  adjective (masculine)
  Past Passive Participle
  Negated past passive participle from root śaṅk (to fear, doubt)
  Root: śaṅk (class 1)
• utpatat – rising, leaping up, flying up
  adjective (masculine)
  Present Active Participle
  Derived from ut-pat (to fly up, leap up) + śatṛ suffix
  Prefix: ut
  Root: pat (class 1)
• vāri – water
  noun (neuter)
• pūra – flood, mass, abundance, stream
  noun (masculine)
  Noun of action
  Derived from root pṛ (to fill) or pūr (to fill)
  Root: pṛ (class 3)
• pāta – fall, descent, falling
  noun (masculine)
  Noun of action
  Derived from root pat (to fall) + ghañ suffix
  Root: pat (class 1)
• paṭa – cloth, curtain, screen
  noun (masculine)
• āvṛta – covered, enveloped, veiled
  adjective (masculine)
  Past Passive Participle
  Derived from ā-vṛ (to cover) + kta suffix
  Prefix: ā
  Root: vṛ (class 5)

Note: Qualifies an implied plural subject.

उत्पात-पात-निपतत्-वितानक-वृताः (utpāta-pāta-nipatat-vitānaka-vṛtāḥ) - covered as if by a canopy falling catastrophically (covered by an awning falling down calamitously)

(adjective)

Nominative, masculine, plural of utpāta-pāta-nipatat-vitānaka-vṛta

utpāta-pāta-nipatat-vitānaka-vṛta - covered by an awning falling due to a calamity

Past Passive Participle

From vṛ (to cover) + kta suffix.

Compound type : tatpuruṣa (utpāta+pāta+nipatat+vitānaka+vṛta)

• utpāta – calamity, sudden event, catastrophic fall
  noun (masculine)
  Noun of action
  Derived from ut-pat (to fly up, fall) + ghañ suffix
  Prefix: ut
  Root: pat (class 1)
• pāta – fall, descent, falling
  noun (masculine)
  Noun of action
  Derived from root pat (to fall) + ghañ suffix
  Root: pat (class 1)
• nipatat – falling down, descending
  adjective (masculine)
  Present Active Participle
  Derived from ni-pat (to fall down) + śatṛ suffix
  Prefix: ni
  Root: pat (class 1)
• vitānaka – awning, canopy, expanded roof
  noun (neuter)
  Diminutive of vitāna (spread, canopy)
• vṛta – covered, enveloped
  adjective (masculine)
  Past Passive Participle
  Derived from root vṛ (to cover) + kta suffix
  Root: vṛ (class 5)

Note: Qualifies an implied plural subject, forms part of the simile.

इव (iva) - as if (like, as if, as)

(indeclinable)