वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-33, verse-13

वीरः प्रतपनो घोरो राक्षसो रणदुर्धरः ।
समरे तीक्ष्णवेगेन नलेन समयुध्यत ॥१३॥

13. vīraḥ pratapano ghoro rākṣaso raṇadurdharaḥ ,
samare tīkṣṇavegena nalena samayudhyata.

13. vīraḥ pratāpanaḥ ghoraḥ rākṣasaḥ raṇadurdharaḥ
samare tīkṣṇavegena nalena samayudhyata

13. The heroic, terrible demon Pratapana, formidable in battle, fought with Nala with fierce speed in combat.

Words meanings summery:

• वीरः (vīraḥ) - heroic (heroic, brave, warrior, hero)

• प्रतापनः (pratāpanaḥ) - The demon Pratapana (Pratapana (proper name); tormenting, scorching)

• घोरः (ghoraḥ) - terrible (terrible, dreadful, fearful)

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

• रणदुर्धरः (raṇadurdharaḥ) - formidable in battle (formidable in battle, invincible in combat)

• समरे (samare) - in combat (in battle, in war)

• तीक्ष्णवेगेन (tīkṣṇavegena) - with fierce speed (with fierce speed, with sharp impetuosity)

• नलेन (nalena) - with Nala (by Nala, with Nala)

• समयुध्यत (samayudhyata) - fought (fought, battled)

Words meanings and morphology

वीरः (vīraḥ) - heroic (heroic, brave, warrior, hero)

(adjective)

Nominative, masculine, singular of vīra

vīra - hero, warrior, brave, heroic

Note: Describes Pratapana.

प्रतापनः (pratāpanaḥ) - The demon Pratapana (Pratapana (proper name); tormenting, scorching)

(proper noun)

Nominative, masculine, singular of pratāpana

pratāpana - Pratapana (name of a demon); heating, scorching, tormenting

agent noun/adjective

From root tap (to heat, torment) with prefix pra-

Prefix: pra

Root: tap (class 1)

घोरः (ghoraḥ) - terrible (terrible, dreadful, fearful)

(adjective)

Nominative, masculine, singular of ghora

ghora - terrible, dreadful, fearful, formidable

Note: Describes Pratapana.

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

(noun)

Nominative, masculine, singular of rākṣasa

rākṣasa - demon, evil spirit

Derived from root rakṣ (to protect), ironically meaning 'one who needs to be protected from' or 'one who harms'.

Root: rakṣ (class 1)

Note: Applies to Pratapana.

रणदुर्धरः (raṇadurdharaḥ) - formidable in battle (formidable in battle, invincible in combat)

(adjective)

Nominative, masculine, singular of raṇadurdhara

raṇadurdhara - formidable in battle, invincible in combat

Compound type : tatpurusha (raṇa+durdhara)

• raṇa – battle, combat, war
  noun (masculine)
  Root: raṇ (class 1)
• durdhara – difficult to bear, formidable, invincible
  adjective (masculine)
  From root dhṛ (to bear, hold) with prefix dur-
  Prefix: dur
  Root: dhṛ (class 1)

Note: Describes Pratapana.

समरे (samare) - in combat (in battle, in war)

(noun)

Locative, masculine, singular of samara

samara - battle, war, combat

तीक्ष्णवेगेन (tīkṣṇavegena) - with fierce speed (with fierce speed, with sharp impetuosity)

(noun)

Instrumental, masculine, singular of tīkṣṇavega

tīkṣṇavega - fierce speed, sharp impetuosity, with sharp impetus

Compound type : karmadharaya (tīkṣṇa+vega)

• tīkṣṇa – sharp, keen, fierce, ardent
  adjective (masculine)
• vega – speed, velocity, impulse, force
  noun (masculine)

Note: Indicates the manner of fighting.

नलेन (nalena) - with Nala (by Nala, with Nala)

(proper noun)

Instrumental, masculine, singular of nala

nala - Nala (name of a prominent monkey warrior, son of Vishvakarma)

Note: Denotes the opponent with whom Pratapana fought.

समयुध्यत (samayudhyata) - fought (fought, battled)

(verb)

3rd person , singular, middle, past imperfect (laṅ) of yudh

Prefix: sam

Root: yudh (class 4)

Note: The prefix 'sam-' here implies 'together with' or 'completely'.