महाभारतः mahābhārataḥ - book-6, chapter-55, verse-125

उपेतकूलां ददृशुः समन्तात्क्रूरां महावैतरणीप्रकाशाम् ।
प्रवर्तितामर्जुनबाणसंघैर्मेदोवसासृक्प्रवहां सुभीमाम् ॥१२५॥

125. upetakūlāṁ dadṛśuḥ samantā;tkrūrāṁ mahāvaitaraṇīprakāśām ,
pravartitāmarjunabāṇasaṁghai;rmedovasāsṛkpravahāṁ subhīmām.

125. upetakūlām dadṛśuḥ samantāt krūrām mahāvaitaraṇīprakāśām
pravartitām arjunabāṇasaṅghaiḥ medovasāsṛkpravahām subhīmām

125. dadṛśuḥ samantāt upetakūlām krūrām mahāvaitaraṇīprakāśām
pravartitām arjunabāṇasaṅghaiḥ medovasāsṛkpravahām subhīmām

125. All around, they saw a truly dreadful and fierce (river), with its banks overflowing, resembling the great Vaitaraṇī (river of hell). It was set in motion by the multitude of Arjuna's arrows and flowed with fat, marrow, and blood.

Words meanings summery:

• उपेतकूलाम् (upetakūlām) - with approached banks, with overflowing banks, with broken banks

• ददृशुः (dadṛśuḥ) - they saw, they beheld

• समन्तात् (samantāt) - all around, on all sides, completely

• क्रूराम् (krūrām) - fierce, cruel, terrible

• महावैतरणीप्रकाशाम् (mahāvaitaraṇīprakāśām) - resembling the great Vaitaraṇī (river of hell)

• प्रवर्तिताम् (pravartitām) - made to flow, caused to be set in motion, instigated

• अर्जुनबाणसङ्घैः (arjunabāṇasaṅghaiḥ) - by the multitudes of Arjuna's arrows, by the showers of Arjuna's arrows

• मेदोवसासृक्प्रवहाम् (medovasāsṛkpravahām) - flowing with fat, marrow, and blood

• सुभीमाम् (subhīmām) - very dreadful, exceedingly terrible

Words meanings and morphology

उपेतकूलाम् (upetakūlām) - with approached banks, with overflowing banks, with broken banks

(adjective)

Accusative, feminine, singular of upetakūlā

upetakūlā - having approached banks, with overflowing banks

Compound type : bahuvrihi (upeta+kūla)

• upeta – approached, gone near, obtained
  adjective
  Past Passive Participle
  Derived from verb 'i' (to go) with upasarga 'upa'
  Prefix: upa
  Root: i (class 2)
• kūla – bank, shore, river bank
  noun (neuter)

ददृशुः (dadṛśuḥ) - they saw, they beheld

(verb)

3rd person , plural, active, perfect (lit) of dṛś

Root: dṛś (class 1)

समन्तात् (samantāt) - all around, on all sides, completely

(indeclinable)

क्रूराम् (krūrām) - fierce, cruel, terrible

(adjective)

Accusative, feminine, singular of krūrā

krūrā - fierce, cruel, terrible

महावैतरणीप्रकाशाम् (mahāvaitaraṇīprakāśām) - resembling the great Vaitaraṇī (river of hell)

(adjective)

Accusative, feminine, singular of mahāvaitaraṇīprakāśā

mahāvaitaraṇīprakāśā - resembling the great Vaitaraṇī river

Compound type : tatpurusha (mahā+vaitaraṇī+prakāśā)

• mahā – great, large, mighty
  adjective
• vaitaraṇī – the mythical river of hell, river of crossing
  proper noun (feminine)
• prakāśā – light, splendor, appearance, resembling
  noun (feminine)

प्रवर्तिताम् (pravartitām) - made to flow, caused to be set in motion, instigated

(adjective)

Accusative, feminine, singular of pravartitā

pravartitā - caused to proceed, set in motion, instigated

Past Passive Participle (causative)

Causative of pra-vṛt

Prefix: pra

Root: vṛt (class 1)

अर्जुनबाणसङ्घैः (arjunabāṇasaṅghaiḥ) - by the multitudes of Arjuna's arrows, by the showers of Arjuna's arrows

(noun)

Instrumental, masculine, plural of arjunabāṇasaṅgha

arjunabāṇasaṅgha - multitude of Arjuna's arrows

Compound type : tatpurusha (arjuna+bāṇa+saṅgha)

• arjuna – Arjuna (name of a Pāṇḍava prince)
  proper noun (masculine)
• bāṇa – arrow
  noun (masculine)
• saṅgha – multitude, collection, heap, host
  noun (masculine)

मेदोवसासृक्प्रवहाम् (medovasāsṛkpravahām) - flowing with fat, marrow, and blood

(adjective)

Accusative, feminine, singular of medovasāsṛkpravahā

medovasāsṛkpravahā - flowing with fat, marrow, and blood

Compound type : bahuvrihi (medas+vasā+asṛk+pravahā)

• medas – fat, marrow
  noun (neuter)
• vasā – marrow, fat, grease
  noun (feminine)
• asṛk – blood
  noun (neuter)
• pravahā – flowing, stream, current
  noun (feminine)

सुभीमाम् (subhīmām) - very dreadful, exceedingly terrible

(adjective)

Accusative, feminine, singular of subhīmā

subhīmā - very dreadful, exceedingly terrible

Compound type : karmadharaya (su+bhīmā)

• su – good, well, very, exceedingly
  indeclinable
• bhīmā – dreadful, terrible, formidable
  adjective (feminine)