योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-78, verse-9

काष्ठवत्प्रोह्यमाणोग्रसुरासुरजनोत्करः ।
शनैः क्रमोच्छूनतया लिहन्नादित्यमण्डलम् ॥ ९ ॥

kāṣṭhavatprohyamāṇograsurāsurajanotkaraḥ ,
śanaiḥ kramocchūnatayā lihannādityamaṇḍalam 9

9. kāṣṭhavatprohyamāṇograsurāsurajanotkaraḥ
śanaiḥ kramocchūnatayā lihannādityamaṇḍalam

9. kāṣṭhavatprohyamāṇograsurāsurajanotkaraḥ
śanaiḥ kramocchūnatayā lihannādityamaṇḍalam

9. It is a multitude of fierce gods, demons, and people being swept away like logs of wood; slowly, by its gradual swelling, it licks the orb of the sun.

Words meanings summery:

• काष्ठवत्प्रोह्यमाणोग्रसुरासुरजनोत्करः (kāṣṭhavatprohyamāṇograsurāsurajanotkaraḥ) - describing the massive deluge sweeping away all beings, from gods to humans, as if they were mere debris (a multitude of fierce gods, demons, and people being swept away like logs of wood)

• शनैः (śanaiḥ) - slowly, gradually

• क्रमोच्छूनतया (kramocchūnatayā) - by the gradual increase in its size (referring to the deluge) (by gradual swelling/growth)

• लिहन्नादित्यमण्डलम् (lihannādityamaṇḍalam) - the deluge expands so much it reaches and 'licks' or touches the solar disk (licking the orb of the sun)

Words meanings and morphology

काष्ठवत्प्रोह्यमाणोग्रसुरासुरजनोत्करः (kāṣṭhavatprohyamāṇograsurāsurajanotkaraḥ) - describing the massive deluge sweeping away all beings, from gods to humans, as if they were mere debris (a multitude of fierce gods, demons, and people being swept away like logs of wood)

(adjective)

Nominative, masculine, singular of kāṣṭhavatprohyamāṇograsurāsurajanotkara

kāṣṭhavatprohyamāṇograsurāsurajanotkara - one who is a multitude of fierce gods, demons, and people being swept away like logs of wood

Compound type : bahuvrīhi (kāṣṭhavat+prohyamāṇa+ugra+sura+asura+jana+utkara)

• kāṣṭhavat – like wood, like a log
  indeclinable
  Suffix 'vat' indicating similarity.
• prohyamāṇa – being swept away, being carried forward
  participle (masculine)
  Present Passive Participle
  Derived from root 'vah' (to carry) with upasarga 'pra' and passive participle suffix 'śānac'.
  Prefix: pra
  Root: vah (class 1)
• ugra – fierce, terrible, violent
  adjective (masculine)
• sura – god, deity
  noun (masculine)
• asura – demon, titan, anti-god
  noun (masculine)
• jana – person, people, human
  noun (masculine)
• utkara – multitude, heap, mass
  noun (masculine)

शनैः (śanaiḥ) - slowly, gradually

(indeclinable)

क्रमोच्छूनतया (kramocchūnatayā) - by the gradual increase in its size (referring to the deluge) (by gradual swelling/growth)

(noun)

Instrumental, feminine, singular of kramocchūnatā

kramocchūnatā - gradual swelling/growth, progressive increase

Derived from 'krama' (succession) and 'ucchūnatā' (swelling).

Compound type : tatpurusha (krama+ucchūnatā)

• krama – step, course, order, succession, gradualness
  noun (masculine)
  Root: kram (class 1)
• ucchūnatā – swelling, rising, exuberance
  noun (feminine)
  Derived from 'ucchūna' (swollen) with suffix 'tā'.

लिहन्नादित्यमण्डलम् (lihannādityamaṇḍalam) - the deluge expands so much it reaches and 'licks' or touches the solar disk (licking the orb of the sun)

(adjective)

Nominative, masculine, singular of lihannādityamaṇḍala

lihannādityamaṇḍala - one who is licking the orb of the sun

Compound type : tatpurusha (lihan+ādityamaṇḍala)

• lihan – licking
  participle (masculine)
  Present Active Participle
  Derived from root 'lih' (to lick) with present active participle suffix.
  Root: lih (class 2)
• ādityamaṇḍala – orb of the sun, solar disk
  noun (neuter)
  Compound of 'āditya' (sun) and 'maṇḍala' (orb/disk).

Note: Acts as an adjective for the implicit subject (the deluge).