योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-78, verse-13

चण्डवातकृतापूर्वजलौघकुलपर्वतैः ।
महाघुरघुरारावघर्घरोग्रमहारयः ॥ १३ ॥

caṇḍavātakṛtāpūrvajalaughakulaparvataiḥ ,
mahāghuraghurārāvaghargharogramahārayaḥ 13

13. caṇḍavātakṛtāpūrvajalaughakulaparvataiḥ
mahāghuraghurārāvaghargahrogrāhārayaḥ

13. caṇḍavātakṛtāpūrvajalaughakulaparvataiḥ
mahāghuraghurārāvaghargahrogrāhārayaḥ

13. It is a mighty, impetuous current, terrible with its rumbling and gurgling roar, manifesting with principal mountains of unprecedented water floods, themselves formed by fierce winds.

Words meanings summery:

• चण्डवातकृतापूर्वजलौघकुलपर्वतैः (caṇḍavātakṛtāpūrvajalaughakulaparvataiḥ) - by the principal mountains of unprecedented floods of water, created by fierce winds

• महाघुरघुरारावघर्गह्रोग्राहारयः (mahāghuraghurārāvaghargahrogrāhārayaḥ) - a mighty, fierce, impetuous current with rumbling and gurgling roars

Words meanings and morphology

चण्डवातकृतापूर्वजलौघकुलपर्वतैः (caṇḍavātakṛtāpūrvajalaughakulaparvataiḥ) - by the principal mountains of unprecedented floods of water, created by fierce winds

(noun)

Instrumental, masculine, plural of caṇḍavātakṛtāpūrvajalaughakulaparvata

caṇḍavātakṛtāpūrvajalaughakulaparvata - principal mountain of unprecedented floods of water, created by fierce winds

Compound type : tatpuruṣa (caṇḍa+vāta+kṛta+apūrva+jala+ogha+kula+parvata)

• caṇḍa – fierce, violent, passionate
  adjective
• vāta – wind, air
  noun (masculine)
  Root: vā (class 2)
• kṛta – made, done, created
  adjective
  Past Passive Participle
  Derived from root kṛ (to do, to make)
  Root: kṛ (class 8)
• apūrva – unprecedented, novel, unique
  adjective
• jala – water
  noun (neuter)
• ogha – flood, stream, mass
  noun (masculine)
• kula – family, lineage, noble, principal
  noun (neuter)
• parvata – mountain, hill
  noun (masculine)

महाघुरघुरारावघर्गह्रोग्राहारयः (mahāghuraghurārāvaghargahrogrāhārayaḥ) - a mighty, fierce, impetuous current with rumbling and gurgling roars

(noun)

Nominative, masculine, singular of mahāghuraghurārāvaghargahrogrāhāraya

mahāghuraghurārāvaghargahrogrāhāraya - mighty, fierce, impetuous current with rumbling and gurgling roars

Compound type : karmadhāraya (mahā+ghuraghurā+rāva+gharghara+ugra+mahā+ari)

• mahā – great, mighty
  adjective
• ghuraghurā – rumbling sound, gurgling sound
  noun (feminine)
• rāva – roar, cry, sound
  noun (masculine)
  Root: ru (class 2)
• gharghara – gurgling, rattling, roaring sound
  noun (masculine)
• ugra – fierce, terrible, violent
  adjective
• mahā – great, mighty
  adjective
• ari – swift, impetuous current; wind; a spoke; a wheel's circumference
  noun (masculine)
  Derived from root ṛ (to go, move)
  Root: ṛ (class 5)

Note: The final `aḥ` in `arayaḥ` is the nominative singular ending for `ari` (i-stem masculine noun).