वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-3, chapter-25, verse-12

महाकपालो विपुलं शूलमुद्यम्य राक्षसः ।
स्थूलाक्षः पट्टिशं गृह्य प्रमाथी च परश्वधम् ॥१२॥

12. mahākapālo vipulaṃ śūlamudyamya rākṣasaḥ ,
sthūlākṣaḥ paṭṭiśaṃ gṛhya pramāthī ca paraśvadham.

12. mahākapālaḥ vipulam śūlam udyamya rākṣasaḥ
sthūlākṣaḥ paṭṭiśam gṛhya pramāthī ca paraśvadham

12. rākṣasaḥ mahākapālaḥ vipulam śūlam udyamya
sthūlākṣaḥ paṭṭiśam gṛhya ca pramāthī paraśvadham

12. The demon Mahākapāla, brandishing a massive spear, and Sthūlākṣa, grasping a battle-axe, and Pramāthī (holding) a hatchet...

Words meanings summery:

• महाकपालः (mahākapālaḥ) - Mahākapāla (a demon)

• विपुलम् (vipulam) - vast, wide, large

• शूलम् (śūlam) - spear, pike, trident

• उद्यम्य (udyamya) - having raised, having lifted, having brandished

• राक्षसः (rākṣasaḥ) - the demon Mahākapāla (demon, evil spirit)

• स्थूलाक्षः (sthūlākṣaḥ) - Sthūlākṣa (a demon)

• पट्टिशम् (paṭṭiśam) - a kind of spear, battle-axe, missile

• गृह्य (gṛhya) - having taken, having grasped, having seized

• प्रमाथी (pramāthī) - Pramāthī (a demon)

• च (ca) - and, also

• परश्वधम् (paraśvadham) - battle-axe, hatchet

Words meanings and morphology

महाकपालः (mahākapālaḥ) - Mahākapāla (a demon)

(proper noun)

Nominative, masculine, singular of mahākapāla

mahākapāla - Great-skull, a demon's name

Compound type : bahuvrīhi (mahā+kapāla)

• mahā – great, large, mighty
  adjective (feminine)
• kapāla – skull, begging bowl, forehead, a lid
  noun (masculine)

विपुलम् (vipulam) - vast, wide, large

(adjective)

Accusative, neuter, singular of vipula

vipula - vast, wide, large, extensive, abundant

Prefix: vi

Root: pul (class 1)

Note: Agrees with śūlam.

शूलम् (śūlam) - spear, pike, trident

(noun)

Accusative, neuter, singular of śūla

śūla - spear, pike, trident; pain, agony

उद्यम्य (udyamya) - having raised, having lifted, having brandished

(indeclinable)

absolutive/gerund

Derived from ud-yam with -ya suffix (absolutive)

Prefix: ud

Root: yam (class 1)

राक्षसः (rākṣasaḥ) - the demon Mahākapāla (demon, evil spirit)

(noun)

Nominative, masculine, singular of rākṣasa

rākṣasa - demon, evil spirit; belonging to rākṣasas

Note: Refers to Mahākapāla.

स्थूलाक्षः (sthūlākṣaḥ) - Sthūlākṣa (a demon)

(proper noun)

Nominative, masculine, singular of sthūlākṣa

sthūlākṣa - Fat-eyed, a demon's name

Compound type : bahuvrīhi (sthūla+akṣa)

• sthūla – thick, fat, large, gross
  adjective (masculine)
• akṣa – eye, axle, dice
  noun (neuter)

पट्टिशम् (paṭṭiśam) - a kind of spear, battle-axe, missile

(noun)

Accusative, neuter, singular of paṭṭiśa

paṭṭiśa - a kind of sharp-edged spear or missile, a battle-axe

गृह्य (gṛhya) - having taken, having grasped, having seized

(indeclinable)

absolutive/gerund

Derived from grah with -ya suffix (absolutive)

Root: grah (class 9)

प्रमाथी (pramāthī) - Pramāthī (a demon)

(proper noun)

Nominative, masculine, singular of pramāthin

pramāthin - destroyer, oppressor; a demon's name

Prefix: pra

Root: math (class 1)

Note: Nominative singular of pramāthin.

च (ca) - and, also

(indeclinable)

Note: Conjunction.

परश्वधम् (paraśvadham) - battle-axe, hatchet

(noun)

Accusative, masculine, singular of paraśvadha

paraśvadha - battle-axe, hatchet

Note: Implied action 'gṛhya' (grasping) from Sthūlākṣa applies here too, or simply 'holding'.