महाभारतः mahābhārataḥ - book-7, chapter-139, verse-30

अर्जुनः कौरवं सैन्यमर्जुनं चापि कौरवाः ।
नानाशस्त्रसमावापैरन्योन्यं पर्यपीडयन् ॥३०॥

30. arjunaḥ kauravaṁ sainyamarjunaṁ cāpi kauravāḥ ,
nānāśastrasamāvāpairanyonyaṁ paryapīḍayan.

30. arjunaḥ kauravam sainyam arjunam ca api kauravāḥ
nānāśastra-samāvāpaiḥ anyonyam paryapīḍayan

30. arjunaḥ kauravam sainyam ca kauravāḥ arjunam
api nānāśastra-samāvāpaiḥ anyonyam paryapīḍayan

30. Arjuna tormented the Kaurava army, and the Kauravas, in turn, tormented Arjuna. Both sides mutually afflicted each other with barrages of various weapons.

Words meanings summery:

• अर्जुनः (arjunaḥ) - The Pāṇḍava prince Arjuna (Arjuna)

• कौरवम् (kauravam) - the Kaurava (of the Kauravas, related to the Kauravas)

• सैन्यम् (sainyam) - the army (of the Kauravas) (army, host)

• अर्जुनम् (arjunam) - The Pāṇḍava prince Arjuna (Arjuna)

• च (ca) - and (and, also)

• अपि (api) - in turn, also (also, even, too)

• कौरवाः (kauravāḥ) - the Kaurava warriors (the Kauravas, descendants of Kuru)

• नानाशस्त्र-समावापैः (nānāśastra-samāvāpaiḥ) - by barrages of various weapons (by showers of various weapons, by multitude of diverse arms)

• अन्योन्यम् (anyonyam) - mutually (mutually, each other)

• पर्यपीडयन् (paryapīḍayan) - they mutually afflicted (each other) (they tormented, they afflicted)

Words meanings and morphology

अर्जुनः (arjunaḥ) - The Pāṇḍava prince Arjuna (Arjuna)

(proper noun)

Nominative, masculine, singular of arjuna

arjuna - Arjuna (proper name); white, clear, silver

कौरवम् (kauravam) - the Kaurava (of the Kauravas, related to the Kauravas)

(adjective)

Accusative, neuter, singular of kaurava

kaurava - descendant of Kuru; belonging to the Kurus

Derived from Kuru, referring to the descendants or related to the Kuru dynasty.

Note: Agrees with 'sainyam'.

सैन्यम् (sainyam) - the army (of the Kauravas) (army, host)

(noun)

Accusative, neuter, singular of sainya

sainya - army, host, military force

अर्जुनम् (arjunam) - The Pāṇḍava prince Arjuna (Arjuna)

(proper noun)

Accusative, masculine, singular of arjuna

arjuna - Arjuna (proper name); white, clear, silver

च (ca) - and (and, also)

(indeclinable)

अपि (api) - in turn, also (also, even, too)

(indeclinable)

Note: Reinforces the idea of reciprocal action or 'in turn'.

कौरवाः (kauravāḥ) - the Kaurava warriors (the Kauravas, descendants of Kuru)

(noun)

Nominative, masculine, plural of kaurava

kaurava - descendant of Kuru; belonging to the Kurus

Derived from Kuru, referring to the descendants of the Kuru dynasty.

नानाशस्त्र-समावापैः (nānāśastra-samāvāpaiḥ) - by barrages of various weapons (by showers of various weapons, by multitude of diverse arms)

(noun)

Instrumental, masculine, plural of nānāśastra-samāvāpa

nānāśastra-samāvāpa - shower of various weapons

Compound type : ṣaṣṭhī-tatpuruṣa (nānāśastra+samāvāpa)

• nānāśastra – various weapons, diverse arms
  noun (neuter)
• samāvāpa – throwing together, scattering, strewing; shower, deluge
  noun (masculine)
  From prefix 'sam-ā-' and root 'vap' (to sow, scatter).
  Prefixes: sam+ā
  Root: vap (class 1)

Note: Compound word referring to barrages of diverse weapons.

अन्योन्यम् (anyonyam) - mutually (mutually, each other)

(indeclinable)

Note: Accusative singular neuter of anyonya, used adverbially.

पर्यपीडयन् (paryapīḍayan) - they mutually afflicted (each other) (they tormented, they afflicted)

(verb)

3rd person , plural, active, imperfect past (laṅ) of pīḍ

Prefix: pari

Root: pīḍ (class 10)

Note: The prefix 'pari' indicates completeness or surrounding, here reinforcing the intensity or mutual nature of the affliction.