योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-75, verse-48

पपाठ शब्द आग्नेयो ज्वालातटतटोद्भवः ।
लोकपालपुरापाततप्ताङ्गाराद्रिभित्तयः ॥ ४८ ॥

papāṭha śabda āgneyo jvālātaṭataṭodbhavaḥ ,
lokapālapurāpātataptāṅgārādribhittayaḥ 48

48. papāṭha śabdaḥ āgneyaḥ jvālā-taṭa-taṭa-udbhavaḥ
lokapāla-pura-apāta-tapta-aṅgāra-adri-bhittayaḥ

48. āgneyaḥ jvālā-taṭa-taṭa-udbhavaḥ śabdaḥ papāṭha
lokapāla-pura-apāta-tapta-aṅgāra-adri-bhittayaḥ

48. A fiery sound, originating from the immense edges of flames, resounded. The walls of the cities belonging to the guardians of the directions collapsed like mountains of burning embers.

Words meanings summery:

• पपाठ (papāṭha) - resounded, roared, uttered

• शब्दः (śabdaḥ) - roar, thunderous sound (sound, noise, word)

• आग्नेयः (āgneyaḥ) - fiery, scorching (fiery, igneous, relating to Agni)

• ज्वाला-तट-तट-उद्भवः (jvālā-taṭa-taṭa-udbhavaḥ) - originating from the immense, fiery margins of flames (arising from the banks/edges of flames)

• लोकपाल-पुर-अपात-तप्त-अङ्गार-अद्रि-भित्तयः (lokapāla-pura-apāta-tapta-aṅgāra-adri-bhittayaḥ) - referring to walls of cities, belonging to the guardians of the directions, that were collapsing like mountains of burning embers due to the intense heat/fire (whose walls were mountains of burning embers falling upon the cities of the guardians of the directions)

Words meanings and morphology

पपाठ (papāṭha) - resounded, roared, uttered

(verb)

3rd person , singular, active, perfect (liṭ) of paṭh

Past Tense (Perfect)

Root 'paṭh' (class 1, paṭhati). Reduplicated perfect form.

Root: paṭh (class 1)

शब्दः (śabdaḥ) - roar, thunderous sound (sound, noise, word)

(noun)

Nominative, masculine, singular of śabda

śabda - sound, noise, word, language

Root: śabd (class 1)

आग्नेयः (āgneyaḥ) - fiery, scorching (fiery, igneous, relating to Agni)

(adjective)

Nominative, masculine, singular of āgneya

āgneya - fiery, igneous, relating to Agni (the fire god)

Derived from 'agni' (fire)

ज्वाला-तट-तट-उद्भवः (jvālā-taṭa-taṭa-udbhavaḥ) - originating from the immense, fiery margins of flames (arising from the banks/edges of flames)

(adjective)

Nominative, masculine, singular of jvālā-taṭa-taṭa-udbhava

jvālā-taṭa-taṭa-udbhava - born from the banks/edges of flames

Compound

Compound type : tatpuruṣa (jvālā+taṭa+taṭa+udbhava)

• jvālā – flame, blaze, tongue of fire
  noun (feminine)
  Root: jval (class 1)
• taṭa – bank, shore, edge, side
  noun (masculine)
• taṭa – bank, shore, edge, side
  noun (masculine)
• udbhava – origin, source, birth, production
  noun (masculine)
  From 'ud' (up) + 'bhū' (to be)
  Prefix: ud
  Root: bhū (class 1)

लोकपाल-पुर-अपात-तप्त-अङ्गार-अद्रि-भित्तयः (lokapāla-pura-apāta-tapta-aṅgāra-adri-bhittayaḥ) - referring to walls of cities, belonging to the guardians of the directions, that were collapsing like mountains of burning embers due to the intense heat/fire (whose walls were mountains of burning embers falling upon the cities of the guardians of the directions)

(noun)

Nominative, feminine, plural of lokapāla-pura-apāta-tapta-aṅgāra-adri-bhitti

lokapāla-pura-apāta-tapta-aṅgāra-adri-bhitti - walls that are like mountains of heated embers, having fallen on the cities of the world-guardians

Compound

Compound type : bahuvrīhi (lokapāla+pura+apāta+tapta+aṅgāra+adri+bhitti)

• lokapāla – guardian of the world, guardian of a cardinal direction (Indra, Agni, Yama, Nirṛti, Varuṇa, Vāyu, Kubera, Īśāna)
  noun (masculine)
  'loka' (world) + 'pāla' (protector)
  Root: pā (class 2)
• pura – city, fortress, dwelling
  noun (neuter)
• apāta – falling, descent, falling down
  noun (masculine)
  From 'ā' + 'pat' (to fall). The 'ā' is long.
  Prefix: ā
  Root: pat (class 1)
• tapta – heated, hot, burnt, glowing
  adjective
  Past Passive Participle
  From root 'tap' (to heat, to burn)
  Root: tap (class 1)
• aṅgāra – charcoal, burning coal, ember
  noun (masculine)
• adri – mountain, rock, stone
  noun (masculine)
• bhitti – wall, partition, fragment, crack
  noun (feminine)
  From root 'bhid' (to cleave, split)
  Root: bhid (class 7)

Note: This entire compound acts as a noun in the nominative plural, describing the state of walls.