योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-26, verse-42

अस्त्रनिर्मितदुर्वारतमःकल्पान्तरात्रिकम् ।
मायासूर्यगणोद्द्योतैः पीतातनुतमःपटम् ॥ ४२ ॥

astranirmitadurvāratamaḥkalpāntarātrikam ,
māyāsūryagaṇoddyotaiḥ pītātanutamaḥpaṭam 42

42. astranirmitadurvāratamaḥkalpāntarātrikam
māyāsūryagaṇoddyotaiḥ pītātanutamaḥpaṭam

42. astranirmitadurvāratamaḥkalpāntarātrikam
māyāsūryagaṇoddyotaiḥ pītātanutamaḥpaṭam

42. Him who, by means of his weapons (astra), generated an irresistible darkness akin to the night of cosmic dissolution (kalpānta), and whose expansive veil of darkness was then swallowed by the brilliant radiance of a multitude of illusory suns (māyā-sūrya).

Words meanings summery:

• अस्त्रनिर्मितदुर्वारतमःकल्पान्तरात्रिकम् (astranirmitadurvāratamaḥkalpāntarātrikam) - Describing the entity's power to wield weapons and invoke cosmic-level darkness. (One who created irresistible darkness like the night of cosmic dissolution with weapons.)

• मायासूर्यगणोद्द्योतैः (māyāsūryagaṇoddyotaiḥ) - Referring to the entity's divine power (māyā) to create and use light to dispel darkness. (By the brilliant radiance of a multitude of illusory suns.)

• पीतातनुतमःपटम् (pītātanutamaḥpaṭam) - Describes the entity's power to dispel the darkness it created or controls. (One whose vast screen of darkness was swallowed/absorbed.)

Words meanings and morphology

अस्त्रनिर्मितदुर्वारतमःकल्पान्तरात्रिकम् (astranirmitadurvāratamaḥkalpāntarātrikam) - Describing the entity's power to wield weapons and invoke cosmic-level darkness. (One who created irresistible darkness like the night of cosmic dissolution with weapons.)

(adjective)

Accusative, masculine, singular of astranirmitadurvāratamaḥkalpāntarātrika

astranirmitadurvāratamaḥkalpāntarātrika - one who created irresistible darkness like the night of cosmic dissolution with weapons

Compound type : Bahuvrīhi (astra+nirmita+durvāra+tamas+kalpānta+rātrika)

• astra – weapon, missile, projectile
  noun (neuter)
  Root: as (class 4)
• nirmita – created, made, constructed
  adjective
  Past Passive Participle
  Derived from root mā (to measure, create) with upasarga nir- (out, away) + kta suffix.
  Prefix: nir
  Root: mā (class 2)
• durvāra – irresistible, difficult to ward off, invincible
  adjective
  Compound of dur (difficult) + vāra (warding off, holding back).
  Prefix: dur
  Root: vṛ (class 9)
• tamas – darkness, gloom, ignorance
  noun (neuter)
  Root: tam (class 4)
• kalpānta – end of a cosmic age, dissolution of the universe
  noun (masculine)
  Compound of kalpa (cosmic age) + anta (end).
• rātrika – relating to night, nocturnal
  adjective
  Derived from rātri (night) with ṭhak suffix.

Note: This entire compound describes an entity, functioning as an accusative attribute.

मायासूर्यगणोद्द्योतैः (māyāsūryagaṇoddyotaiḥ) - Referring to the entity's divine power (māyā) to create and use light to dispel darkness. (By the brilliant radiance of a multitude of illusory suns.)

(noun)

Instrumental, masculine, plural of māyāsūryagaṇoddyota

māyāsūryagaṇoddyota - radiance of a multitude of illusory suns (māyā-sūrya)

Compound type : Tatpuruṣa (māyā+sūrya+gaṇa+uddyota)

• māyā – illusion, magic, divine power (māyā), artifice
  noun (feminine)
  Root: mā (class 2)
• sūrya – sun, sun god
  noun (masculine)
  Root: svar (class 1)
• gaṇa – multitude, host, troop, collection
  noun (masculine)
  Root: gaṇ (class 10)
• uddyota – illumination, radiance, light
  noun (masculine)
  Derived from root dyut (to shine) with upasarga ud- (up, forth).
  Prefix: ud
  Root: dyut (class 1)

Note: This compound describes the means by which the darkness was swallowed.

पीतातनुतमःपटम् (pītātanutamaḥpaṭam) - Describes the entity's power to dispel the darkness it created or controls. (One whose vast screen of darkness was swallowed/absorbed.)

(adjective)

Accusative, masculine, singular of pītātanutamaḥpaṭa

pītātanutamaḥpaṭa - one whose vast screen of darkness was swallowed/absorbed

Compound type : Bahuvrīhi (pīta+atanu+tamas+paṭa)

• pīta – drunk, swallowed, absorbed
  adjective
  Past Passive Participle
  Derived from root pā (to drink) + kta suffix.
  Root: pā (class 1)
• atanu – not thin, vast, extensive, immense
  adjective
  Compound of a- (not) + tanu (thin, subtle).
• tamas – darkness, gloom
  noun (neuter)
  Root: tam (class 4)
• paṭa – cloth, screen, veil, curtain
  noun (masculine)

Note: This entire compound describes an entity, functioning as an accusative attribute. Here, it is the object of the action performed by the māyāsūryagaṇoddyotaiḥ.