महाभारतः mahābhārataḥ - book-8, chapter-26, verse-43

महेन्द्रविष्णुप्रतिमावनिन्दितौ रथाश्वनागप्रवरप्रमाथिनौ ।
अवध्यकल्पौ निहतौ यदा परैस्ततो ममाद्यापि रणेऽस्ति साध्वसम् ॥४३॥

43. mahendraviṣṇupratimāvaninditau; rathāśvanāgapravarapramāthinau ,
avadhyakalpau nihatau yadā parai;stato mamādyāpi raṇe'sti sādhvasam.

43. mahendraviṣṇupratimau aninditau
rathāśvanāgapravarapramāthinau
avadhyakalpau nihatāu yadā paraiḥ tataḥ
mama adya api raṇe asti sādhvasam

43. yadā mahendraviṣṇupratimau aninditau rathāśvanāgapravarapramāthinau avadhyakalpau paraiḥ nihatāu,
tataḥ adya api mama raṇe sādhvasam asti

43. My fear (sādhvasam) still lingers on the battlefield, even today, because those two, who were like the great Indra and Vishnu, blameless, destroyers of the finest chariots, horses, and elephants, and virtually invincible, were killed by the enemies.

Words meanings summery:

• महेन्द्रविष्णुप्रतिमौ (mahendraviṣṇupratimau) - Refers to two fallen heroes (likely Bhishma and Drona) (like Mahendra and Vishnu, equal to Mahendra and Vishnu)

• अनिन्दितौ (aninditau) - Refers to the two fallen heroes (blameless, irreproachable)

• रथाश्वनागप्रवरप्रमाथिनौ (rathāśvanāgapravarapramāthinau) - Refers to the two fallen heroes (destroyers of the best chariots, horses, and elephants)

• अवध्यकल्पौ (avadhyakalpau) - Refers to the two fallen heroes (almost invulnerable, virtually invulnerable)

• निहताउ (nihatāu) - Refers to the two fallen heroes (killed, struck down)

• यदा (yadā) - when

• परैः (paraiḥ) - by enemies, by others

• ततः (tataḥ) - then, from that, therefore

• मम (mama) - my, of me

• अद्य (adya) - today

• अपि (api) - even, also

• रणे (raṇe) - in battle, in war

• अस्ति (asti) - is, exists

• साध्वसम् (sādhvasam) - fear, terror, apprehension, anxiety

Words meanings and morphology

महेन्द्रविष्णुप्रतिमौ (mahendraviṣṇupratimau) - Refers to two fallen heroes (likely Bhishma and Drona) (like Mahendra and Vishnu, equal to Mahendra and Vishnu)

(adjective)

Nominative, masculine, dual of mahendraviṣṇupratima

mahendraviṣṇupratima - like Mahendra (great Indra) and Vishnu

compound: Mahendra + Viṣṇu + pratima (like)

Compound type : upapada-tatpuruṣa (mahendra+viṣṇu+pratima)

• mahendra – great Indra
  proper noun (masculine)
• viṣṇu – Vishnu (name of a deity)
  proper noun (masculine)
• pratima – likeness, image, comparable to
  adjective (masculine)

Note: Refers to the two heroes (Bhishma and Drona) in the dual.

अनिन्दितौ (aninditau) - Refers to the two fallen heroes (blameless, irreproachable)

(adjective)

Nominative, masculine, dual of anindita

anindita - blameless, irreproachable, faultless

compound: a (not) + nindita (blamed/reproached)

Compound type : nañ-tatpuruṣa (a+nindita)

• a – not, un-
  indeclinable
• nindita – blamed, reproached
  participle
  past passive participle
  from root nind
  Root: nind (class 1)

Note: Agrees with 'mahendraviṣṇupratimau'.

रथाश्वनागप्रवरप्रमाथिनौ (rathāśvanāgapravarapramāthinau) - Refers to the two fallen heroes (destroyers of the best chariots, horses, and elephants)

(noun)

Nominative, masculine, dual of rathāśvanāgapravarapramāthin

rathāśvanāgapravarapramāthin - destroyer of the best chariots, horses, and elephants

Compound: ratha (chariot) + aśva (horse) + nāga (elephant) + pravara (excellent, best) + pramāthin (destroyer)

Compound type : ṣaṣṭhī-tatpuruṣa (ratha+aśva+nāga+pravara+pramāthin)

• ratha – chariot
  noun (masculine)
• aśva – horse
  noun (masculine)
• nāga – elephant, snake
  noun (masculine)
• pravara – best, excellent, chief
  adjective (masculine)
• pramāthin – destroyer, tormentor
  noun (masculine)
  agent noun
  from root math with prefix pra
  Prefix: pra
  Root: math (class 1)

Note: Agrees with 'mahendraviṣṇupratimau'.

अवध्यकल्पौ (avadhyakalpau) - Refers to the two fallen heroes (almost invulnerable, virtually invulnerable)

(adjective)

Nominative, masculine, dual of avadhyakalpa

avadhyakalpa - almost invulnerable/invincible

Compound: avadhya (not to be killed) + kalpa (almost, nearly)

Compound type : tatpuruṣa (avadhya+kalpa)

• avadhya – not to be killed, invulnerable
  gerundive (masculine)
  gerundive (kṛtya)
  from root vadh (han) with negative a-prefix
  Prefix: a
  Root: han (class 2)
• kalpa – almost, nearly, resembling
  indeclinable

Note: Agrees with 'mahendraviṣṇupratimau'.

निहताउ (nihatāu) - Refers to the two fallen heroes (killed, struck down)

(participle)

Nominative, masculine, dual of nihata

nihata - killed, struck down, destroyed

past passive participle

from root han with prefix ni

Prefix: ni

Root: han (class 2)

Note: Agrees with 'mahendraviṣṇupratimau'.

यदा (yadā) - when

(indeclinable)

परैः (paraiḥ) - by enemies, by others

(noun)

Instrumental, masculine, plural of para

para - other, enemy, supreme

ततः (tataḥ) - then, from that, therefore

(indeclinable)

मम (mama) - my, of me

(pronoun)

Genitive, singular of asmad

asmad - I, we

अद्य (adya) - today

(indeclinable)

अपि (api) - even, also

(indeclinable)

रणे (raṇe) - in battle, in war

(noun)

Locative, masculine, singular of raṇa

raṇa - battle, war, combat

अस्ति (asti) - is, exists

(verb)

3rd person , singular, active, present (laṭ) of as

present active

from root as

Root: as (class 2)

साध्वसम् (sādhvasam) - fear, terror, apprehension, anxiety

(noun)

Nominative, neuter, singular of sādhvasa

sādhvasa - fear, terror, apprehension, anxiety