योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-66, verse-21

भुवनं बोधयन्ती द्यौश्चन्द्रार्ककरचामरैः ।
स्थिताकाशांशुकाकल्पतारकोत्करशेखरा ॥ २१ ॥

bhuvanaṃ bodhayantī dyauścandrārkakaracāmaraiḥ ,
sthitākāśāṃśukākalpatārakotkaraśekharā 21

21. bhuvanaṃ bodhayantī dyauḥ candrārkakaracāmaraiḥ
sthitākāśāṃśukākalpatārakotkaraśekharā

21. dyauḥ bhuvanaṃ bodhayantī candrārkakaracāmaraiḥ
sthitākāśāṃśukākalpatārakotkaraśekharā

21. The sky, illuminating the world with the moon's and sun's rays as whisk-like fans, appears with a multitude of stars as its crest-jewels and ornaments upon the garment of the stable (ākāśa) space.

Words meanings summery:

• भुवनं (bhuvanaṁ) - the world, the earth, existence

• बोधयन्ती (bodhayantī) - enlightening, awakening, causing to know

• द्यौः (dyauḥ) - the sky, heaven, luminosity

• चन्द्रार्ककरचामरैः (candrārkakaracāmaraiḥ) - with flywhisks that are the rays of the moon and sun

• स्थिताकाशांशुकाकल्पतारकोत्करशेखरा (sthitākāśāṁśukākalpatārakotkaraśekharā) - adorned with multitudes of stars as crest-jewels and ornaments upon the garment of the stable space

Words meanings and morphology

भुवनं (bhuvanaṁ) - the world, the earth, existence

(noun)

Accusative, neuter, singular of bhuvana

bhuvana - world, being, existence, place, creature

From root √bhū (to be, exist).

Root: √bhū (class 1)

बोधयन्ती (bodhayantī) - enlightening, awakening, causing to know

(participle)

Nominative, feminine, singular of bodhayantī

bodhayat - enlightening, awakening, causing to know

Present Active Participle (Causative)

From causative stem of √budh (to know, perceive), i.e., bodhaya.

Root: √budh (class 1)

द्यौः (dyauḥ) - the sky, heaven, luminosity

(noun)

Nominative, feminine, singular of dyu

dyu - sky, heaven, day, light

Irregular noun stem.

चन्द्रार्ककरचामरैः (candrārkakaracāmaraiḥ) - with flywhisks that are the rays of the moon and sun

(noun)

Instrumental, masculine, plural of candrārkakaracāmara

candrārkakaracāmara - flywhisk made of moon and sun rays

Compound type : karmadhāraya or rūpaka compound (rays are flywhisks) nested within a dvandva and tatpuruṣa (candra+arka+kara+cāmara)

• candra – moon
  noun (masculine)
• arka – sun, ray
  noun (masculine)
• kara – hand, ray, tax
  noun (masculine)
• cāmara – flywhisk, yak's tail (used as a fan)
  noun (masculine)

Note: The sun and moon rays serve as whisk-like fans.

स्थिताकाशांशुकाकल्पतारकोत्करशेखरा (sthitākāśāṁśukākalpatārakotkaraśekharā) - adorned with multitudes of stars as crest-jewels and ornaments upon the garment of the stable space

(adjective)

Nominative, feminine, singular of sthitākāśāṃśukākalpatārakotkaraśekhara

sthitākāśāṁśukākalpatārakotkaraśekhara - having stars as ornaments and crest-jewels on the garment of the stable sky

Very long descriptive Bahuvrīhi compound.

Compound type : Bahuvrīhi (sthita+ākāśa+aṃśuka+ākalpa+tāraka+utkara+śekhara)

• sthita – fixed, stable, situated, standing
  adjective (neuter)
  Past Passive Participle
  From root √sthā (to stand)
  Root: √sthā (class 1)
• ākāśa – sky, ether, space
  noun (masculine)
  Prefix: ā
• aṃśuka – garment, fine cloth
  noun (neuter)
• ākalpa – ornament, decoration
  noun (masculine)
  Prefix: ā
• tāraka – star
  noun (masculine)
• utkara – multitude, heap, collection
  noun (masculine)
  Prefix: ut
• śekhara – crest, crown, diadem, peak
  noun (masculine)

Note: Adjective describing dyauḥ.