योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-38, verse-40

म्रियमाणमहावज्ञाशूराश्रितपलायनम् ।
अशङ्कितासृगावर्तभीमास्पदगमोत्सुकम् ॥ ४० ॥

mriyamāṇamahāvajñāśūrāśritapalāyanam ,
aśaṅkitāsṛgāvartabhīmāspadagamotsukam 40

40. mriyamāṇamahāvajñāśūrāśritapalāyanam
aśaṅkitāsṛgāvartabhīmāspadagamotsukam

40. aśaṅkitāsṛgāvartabhīmāspadagamotsukam
mriyamāṇamahāvajñāśūrāśritapalāyanam

40. (It was a scene of) the flight resorted to by brave warriors who, though dying, held great disdain (for death), and where one was eager to fearlessly enter a terrible place of blood-whirlpools.

Words meanings summery:

• म्रियमाणमहावज्ञाशूराश्रितपलायनम् (mriyamāṇamahāvajñāśūrāśritapalāyanam) - describing the paradox of heroic flight amidst battlefield horrors (flight resorted to by brave warriors, who, though dying, held great disdain (for death))

• अशङ्कितासृगावर्तभीमास्पदगमोत्सुकम् (aśaṅkitāsṛgāvartabhīmāspadagamotsukam) - describing the resolve of warriors to face the gruesome battlefield (eager to fearlessly enter a terrible place of blood-whirlpools)

Words meanings and morphology

म्रियमाणमहावज्ञाशूराश्रितपलायनम् (mriyamāṇamahāvajñāśūrāśritapalāyanam) - describing the paradox of heroic flight amidst battlefield horrors (flight resorted to by brave warriors, who, though dying, held great disdain (for death))

(adjective)

Accusative, neuter, singular of mriyamāṇamahāvajñāśūrāśritapalāyana

mriyamāṇamahāvajñāśūrāśritapalāyana - the flight of heroes, who while dying, showed great contempt/disdain

Compound type : Descriptive compound (mriyamāṇa+mahā+avajñā+śūra+āśrita+palāyana)

• mriyamāṇa – dying, about to die
  adjective
  Present Middle Participle
  Derived from root mṛ (to die)
  Root: mṛ (class 6)
• mahā – great, large, mighty
  adjective
• avajñā – contempt, scorn, disdain, disregard
  noun (feminine)
  Prefix: ava
• śūra – hero, brave man, warrior
  noun (masculine)
• āśrita – resorted to, taken refuge in, dependent on
  adjective
  Past Passive Participle
  Derived from root śri (to lean on, resort to) with upasarga ā
  Prefix: ā
  Root: śri (class 1)
• palāyana – flight, fleeing, escape
  noun (neuter)
  Prefix: parā

Note: A long descriptive compound in accusative singular neuter, modifying an implied noun like 'scene' or 'sight'.

अशङ्कितासृगावर्तभीमास्पदगमोत्सुकम् (aśaṅkitāsṛgāvartabhīmāspadagamotsukam) - describing the resolve of warriors to face the gruesome battlefield (eager to fearlessly enter a terrible place of blood-whirlpools)

(adjective)

Accusative, neuter, singular of aśaṅkitāsṛgāvartabhīmāspadagamotsuka

aśaṅkitāsṛgāvartabhīmāspadagamotsuka - eager to go fearlessly to a terrible place of blood-whirlpools

Compound type : Descriptive compound (aśaṅkita+asṛj+āvarta+bhīma+āspada+gama+utsuka)

• aśaṅkita – unhesitating, fearless, undaunted
  adjective
  Compound of a (not) and śaṅkita (feared, doubted)
• asṛj – blood
  noun (neuter)
• āvarta – whirlpool, eddy, turning, revolving
  noun (masculine)
• bhīma – terrible, dreadful, fearful
  adjective
• āspada – place, abode, seat, object
  noun (neuter)
• gama – going, movement, path
  noun (masculine)
  Root: gam (class 1)
• utsuka – eager, longing, desirous, excited
  adjective
  Prefix: ut

Note: A long descriptive compound in accusative singular neuter, modifying an implied noun like 'scene' or 'sight'.