योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-84, verse-13

महोपलतटाघातैर्धरणीतलमृज्जलैः ।
जलौघान्दोलनायातैस्तापैरनलकर्कशैः ॥ १३ ॥

mahopalataṭāghātairdharaṇītalamṛjjalaiḥ ,
jalaughāndolanāyātaistāpairanalakarkaśaiḥ 13

13. mahopalataṭāghātaiḥ dharaṇītalamṛjjalaiḥ
jalaughāndolanāyātaiḥ tāpaiḥ analakarkaśaiḥ

13. mahopalataṭāghātaiḥ dharaṇītalamṛjjalaiḥ
jalaughāndolanāyātaiḥ tāpaiḥ analakarkaśaiḥ

13. This is characterized by the impacts of large rocks against riverbanks, by the waters that scour the earth's surface, by the oscillating movements caused by floods, and by the burning torments as harsh as fire.

Words meanings summery:

• महोपलतटाघातैः (mahopalataṭāghātaiḥ) - by the impacts of large rocks on banks

• धरणीतलमृज्जलैः (dharaṇītalamṛjjalaiḥ) - by the waters that scour the surface of the earth

• जलौघान्दोलनायातैः (jalaughāndolanāyātaiḥ) - by the oscillating movements caused by floods

• तापैः (tāpaiḥ) - by the heats, by the sufferings, by the torments

• अनलकर्कशैः (analakarkaśaiḥ) - by torments as harsh as fire (by those harsh like fire)

Words meanings and morphology

महोपलतटाघातैः (mahopalataṭāghātaiḥ) - by the impacts of large rocks on banks

(noun)

Instrumental, masculine, plural of mahopalataṭāghāta

mahopalataṭāghāta - impact of large rocks on banks

Compound type : tatpuruṣa (mahat+upala+taṭa+āghāta)

• mahat – great, large, mighty
  adjective (neuter)
• upala – stone, rock
  noun (masculine)
• taṭa – bank, shore, slope
  noun (masculine)
• āghāta – strike, impact, blow, collision
  noun (masculine)

धरणीतलमृज्जलैः (dharaṇītalamṛjjalaiḥ) - by the waters that scour the surface of the earth

(noun)

Instrumental, neuter, plural of dharaṇītalamṛjjala

dharaṇītalamṛjjala - waters that cleanse or scour the earth's surface

Compound type : tatpuruṣa (dharaṇītala+mṛjjala)

• dharaṇītala – earth's surface, ground
  noun (neuter)
• mṛjjala – scouring water, water that rubs/cleanses
  noun (neuter)
  From root mṛj (to rub, cleanse) + jala (water)
  Root: mṛj (class 2)

जलौघान्दोलनायातैः (jalaughāndolanāyātaiḥ) - by the oscillating movements caused by floods

(noun)

Instrumental, masculine, plural of jalaughāndolanāyāta

jalaughāndolanāyāta - commotions or oscillations arising from floods

Compound type : tatpuruṣa (jala+ogha+āndolana+āyāta)

• jala – water
  noun (neuter)
• ogha – flood, torrent, stream, multitude
  noun (masculine)
• āndolana – swinging, oscillation, agitation
  noun (neuter)
• āyāta – arrived, resulted, come (from); arrival, result
  noun (masculine)
  Past Passive Participle
  From root yā with prefix ā
  Prefix: ā
  Root: yā (class 2)

तापैः (tāpaiḥ) - by the heats, by the sufferings, by the torments

(noun)

Instrumental, masculine, plural of tāpa

tāpa - heat, torment, suffering, pain, fever

Root: tap (class 1)

अनलकर्कशैः (analakarkaśaiḥ) - by torments as harsh as fire (by those harsh like fire)

(adjective)

Instrumental, masculine, plural of analakarkaśa

analakarkaśa - harsh like fire, fiery and cruel

Compound type : tatpuruṣa (anala+karkaśa)

• anala – fire
  noun (masculine)
• karkaśa – harsh, rough, cruel, severe
  adjective (masculine)

Note: Modifies tāpaiḥ