महाभारतः mahābhārataḥ - book-12, chapter-99, verse-32

पताकाध्वजवानीरा हतवाहनवाहिनी ।
शोणितोदा सुसंपूर्णा दुस्तरा पारगैर्नरैः ॥३२॥

32. patākādhvajavānīrā hatavāhanavāhinī ,
śoṇitodā susaṁpūrṇā dustarā pāragairnaraiḥ.

32. patākā-dhvaja-vānīrā hata-vāhana-vāhinī
śoṇita-udā su-saṃpūrṇā dustarā pāragaiḥ naraiḥ

32. (eṣā vāhinī) patākā-dhvaja-vānīrā (asti),
hata-vāhana-vāhinī (ca asti),
śoṇita-udā (ca asti),
su-saṃpūrṇā (asti),
(ca) pāragaiḥ naraiḥ dustarā (ca asti)

32. This army-river, whose banners and flags are its willows, which consists of slain vehicles, and whose waters are blood; it is completely full, and difficult for men attempting to cross it to traverse.

Words meanings summery:

• पताका-ध्वज-वानीरा (patākā-dhvaja-vānīrā) - banners and flags of war serving as willows in the battle-river (whose banners and flags are willows)

• हत-वाहन-वाहिनी (hata-vāhana-vāhinī) - the current of the battle-river made up of dead war conveyances (whose current is of slain vehicles, or an army of slain vehicles)

• शोणित-उदा (śoṇita-udā) - the battle-river's waters are blood (whose water is blood)

• सु-संपूर्णा (su-saṁpūrṇā) - completely full (with the elements of battle) (completely full, well-filled)

• दुस्तरा (dustarā) - impassable (for anyone trying to cross the battle-river) (difficult to cross, impassable)

• पारगैः (pāragaiḥ) - by men attempting to cross (the river) (by those who cross, by experts in crossing)

• नरैः (naraiḥ) - by men, by humans

Words meanings and morphology

पताका-ध्वज-वानीरा (patākā-dhvaja-vānīrā) - banners and flags of war serving as willows in the battle-river (whose banners and flags are willows)

(noun)

Nominative, feminine, singular of patākādhvajavānīrā

patākādhvajavānīrā - having banners and flags as willows or reeds

Compound type : bahuvrīhi (patākā+dhvaja+vānīra)

• patākā – banner, flag, standard
  noun (feminine)
• dhvaja – flag, banner, standard
  noun (masculine)
• vānīra – willow, reed, cane
  noun (masculine)

हत-वाहन-वाहिनी (hata-vāhana-vāhinī) - the current of the battle-river made up of dead war conveyances (whose current is of slain vehicles, or an army of slain vehicles)

(noun)

Nominative, feminine, singular of hatavāhanavāhinī

hatavāhanavāhinī - a stream/current of slain vehicles, or an army of slain vehicles

Compound type : ṣaṣṭhī-tatpuruṣa (hata+vāhana+vāhinī)

• hata – slain, killed, destroyed
  adjective
  Past Passive Participle
  Derived from root han (to strike, kill).
  Root: han (class 2)
• vāhana – vehicle, mount, conveyance
  noun (neuter)
  Root: vah (class 1)
• vāhinī – army, river, stream, current
  noun (feminine)
  Root: vah (class 1)

शोणित-उदा (śoṇita-udā) - the battle-river's waters are blood (whose water is blood)

(noun)

Nominative, feminine, singular of śoṇitaudā

śoṇitaudā - having blood as water

Compound type : bahuvrīhi (śoṇita+uda)

• śoṇita – blood, red
  noun (neuter)
• uda – water
  noun (neuter)

सु-संपूर्णा (su-saṁpūrṇā) - completely full (with the elements of battle) (completely full, well-filled)

(adjective)

Nominative, feminine, singular of susaṃpūrṇā

susaṁpūrṇā - completely full, well-filled, abundant

Compound of 'su-' (good/well) and 'saṃpūrṇa' (full).

Compound type : karmadhāraya (su+saṃpūrṇa)

• su – good, well, very, excellent
  indeclinable
• saṃpūrṇa – full, complete, perfected
  adjective
  Past Passive Participle
  Derived from root pṛ (to fill) with prefix sam-.
  Prefix: sam
  Root: pṛ (class 3)

दुस्तरा (dustarā) - impassable (for anyone trying to cross the battle-river) (difficult to cross, impassable)

(adjective)

Nominative, feminine, singular of dustara

dustara - difficult to cross or pass over

Gerundive

Derived from root tṛ (to cross) with prefix dus- (difficult).

Prefix: dus

Root: tṛ (class 1)

पारगैः (pāragaiḥ) - by men attempting to cross (the river) (by those who cross, by experts in crossing)

(noun)

Instrumental, masculine, plural of pāraga

pāraga - one who crosses to the other side, one who has reached the end, an expert

Compound of 'pāra' (other side) and root 'gam' (to go).

Compound type : tatpuruṣa (pāra+ga)

• pāra – the opposite bank, shore, the other side
  noun (masculine)
• ga – going, moving, residing in
  adjective
  suffix -ga (from root gam)
  A suffix forming agent nouns or adjectives, derived from root gam 'to go'.
  Root: gam (class 1)

नरैः (naraiḥ) - by men, by humans

(noun)

Instrumental, masculine, plural of nara

nara - man, human, person