महाभारतः mahābhārataḥ - book-8, chapter-65, verse-4

प्रवृद्धशृङ्गद्रुमवीरुदोषधी प्रवृद्धनानाविधपर्वतौकसौ ।
यथाचलौ वा गलितौ महाबलौ तथा महास्त्रैरितरेतरं घ्नतः ॥४॥

4. pravṛddhaśṛṅgadrumavīrudoṣadhī; pravṛddhanānāvidhaparvataukasau ,
yathācalau vā galitau mahābalau; tathā mahāstrairitaretaraṁ ghnataḥ.

4. pravṛddha-śṛṅga-druma-vīrud-oṣadhī
pravṛddha-nānā-vidha-parvata-okasau
yathā acalau vā galitau mahābalau
tathā mahāstraiḥ itaretaram ghnatas

4. yathā pravṛddha-śṛṅga-druma-vīrud-oṣadhī pravṛddha-nānā-vidha-parvata-okasau mahābalau galitau vā acalau,
tathā mahāstraiḥ itaretaram ghnatas

4. Just as two mighty mountains, with their peaks, trees, creepers, and herbs having grown abundantly, and housing numerous kinds of mountain dwellers, might be dislodged and collide, similarly, they (the two heroes) struck each other with great weapons.

Words meanings summery:

• प्रवृद्ध-शृङ्ग-द्रुम-वीरुद्-ओषधी (pravṛddha-śṛṅga-druma-vīrud-oṣadhī) - describing mountains with grown peaks, trees, creepers, and herbs (with prominent peaks, trees, creepers, and herbs)

• प्रवृद्ध-नाना-विध-पर्वत-ओकसौ (pravṛddha-nānā-vidha-parvata-okasau) - describing mountains housing numerous kinds of mountain dwellers (with many kinds of mountain dwellers grown numerous)

• यथा (yathā) - as, just as, like

• अचलौ (acalau) - two mountains, two immovable ones

• वा (vā) - or, either...or

• गलितौ (galitau) - dislodged (referring to mountains colliding) (fallen, dislodged, slipped)

• महाबलौ (mahābalau) - mighty, very powerful

• तथा (tathā) - so, thus, similarly

• महास्त्रैः (mahāstraiḥ) - by great weapons

• इतरेतरम् (itaretaram) - each other, one another

• घ्नतस् (ghnatas) - striking (each other) (striking, killing, smiting)

Words meanings and morphology

प्रवृद्ध-शृङ्ग-द्रुम-वीरुद्-ओषधी (pravṛddha-śṛṅga-druma-vīrud-oṣadhī) - describing mountains with grown peaks, trees, creepers, and herbs (with prominent peaks, trees, creepers, and herbs)

(adjective)

Nominative, masculine, dual of pravṛddhaśṛṅgadrumavīrudoṣadhī

pravṛddhaśṛṅgadrumavīrudoṣadhī - having prominent peaks, trees, creepers, and herbs that have grown

Compound type : bahuvrīhi (pravṛddha+śṛṅga+druma+vīrudh+oṣadhī)

• pravṛddha – grown, developed, abundant
  adjective (neuter)
  Past Passive Participle
  From root 'vṛdh' (to grow) with prefix 'pra'
  Prefix: pra
  Root: vṛdh (class 1)
• śṛṅga – peak, horn
  noun (neuter)
• druma – tree
  noun (masculine)
• vīrudh – creeper, climbing plant
  noun (feminine)
• oṣadhī – herb, plant, medicinal plant
  noun (feminine)

प्रवृद्ध-नाना-विध-पर्वत-ओकसौ (pravṛddha-nānā-vidha-parvata-okasau) - describing mountains housing numerous kinds of mountain dwellers (with many kinds of mountain dwellers grown numerous)

(adjective)

Nominative, masculine, dual of pravṛddhanānāvidhaparvataukasa

pravṛddhanānāvidhaparvataukasa - having many kinds of mountain dwellers that have grown numerous

Compound type : bahuvrīhi (pravṛddha+nānāvidha+parvataukas)

• pravṛddha – grown, developed, abundant
  adjective (neuter)
  Past Passive Participle
  From root 'vṛdh' (to grow) with prefix 'pra'
  Prefix: pra
  Root: vṛdh (class 1)
• nānā-vidha – various kinds, manifold
  adjective (masculine)
• parvata-okas – mountain dweller
  noun (masculine)

यथा (yathā) - as, just as, like

(indeclinable)

अचलौ (acalau) - two mountains, two immovable ones

(noun)

Nominative, masculine, dual of acala

acala - immovable, mountain

वा (vā) - or, either...or

(indeclinable)

गलितौ (galitau) - dislodged (referring to mountains colliding) (fallen, dislodged, slipped)

(adjective)

Nominative, masculine, dual of galita

galita - fallen, dropped, slipped, melted

Past Passive Participle

From root 'gal' (to drop, fall, melt)

Root: gal (class 1)

महाबलौ (mahābalau) - mighty, very powerful

(adjective)

Nominative, masculine, dual of mahābala

mahābala - great strength; very powerful, mighty

Compound type : karmadhāraya (mahā+bala)

• mahā – great, large
  adjective (feminine)
• bala – strength, power, might
  noun (neuter)

तथा (tathā) - so, thus, similarly

(indeclinable)

महास्त्रैः (mahāstraiḥ) - by great weapons

(noun)

Instrumental, neuter, plural of mahāstra

mahāstra - great weapon, powerful missile

Compound type : karmadhāraya (mahā+astra)

• mahā – great, large
  adjective (feminine)
• astra – weapon, missile
  noun (neuter)

इतरेतरम् (itaretaram) - each other, one another

(pronoun)

Accusative, neuter, singular of itaretara

itaretara - each other, one another

Note: Used adverbially to mean 'mutually'

घ्नतस् (ghnatas) - striking (each other) (striking, killing, smiting)

(adjective)

Nominative, masculine, dual of ghnat

ghnat - striking, killing, smiting

Present Active Participle

From root 'han' (to strike, kill)

Root: han (class 2)