महाभारतः mahābhārataḥ - book-6, chapter-54, verse-4

शस्त्राणामथ तां वृष्टिं शलभानामिवायतिम् ।
रुरोध सर्वतः पार्थः शरैः कनकभूषणैः ॥४॥

4. śastrāṇāmatha tāṁ vṛṣṭiṁ śalabhānāmivāyatim ,
rurodha sarvataḥ pārthaḥ śaraiḥ kanakabhūṣaṇaiḥ.

4. śastrāṇām atha tāṃ vṛṣṭiṃ śalabhānām iva āyatim
| rurodha sarvataḥ pārthaḥ śaraiḥ kanakabhūṣaṇaiḥ

4. atha pārthaḥ kanakabhūṣaṇaiḥ śaraiḥ śalabhānām
āyatim iva tāṃ śastrāṇām vṛṣṭiṃ sarvataḥ rurodha

4. Then Pārtha (Arjuna) countered that shower of weapons (śastra), which was like a swarm of locusts, from all sides with arrows adorned with gold.

Words meanings summery:

• शस्त्राणाम् (śastrāṇām) - of weapons, of arms

• अथ (atha) - then, now, moreover

• ताम् (tām) - that (feminine singular)

• वृष्टिं (vṛṣṭiṁ) - shower/volley (of weapons) (shower, rain, volley)

• शलभानाम् (śalabhānām) - of locusts, of grasshoppers

• इव (iva) - like, as, as if

• आयतिम् (āyatim) - swarm, incoming multitude (of locusts) (approach, coming, swarm)

• रुरोध (rurodha) - he obstructed, he checked, he stopped

• सर्वतः (sarvataḥ) - from all sides, all around

• पार्थः (pārthaḥ) - Arjuna (son of Pṛthā, Arjuna)

• शरैः (śaraiḥ) - by arrows

• कनकभूषणैः (kanakabhūṣaṇaiḥ) - by (arrows) having gold ornaments/decoration (by those adorned with gold, by those having gold ornaments)

Words meanings and morphology

शस्त्राणाम् (śastrāṇām) - of weapons, of arms

(noun)

Genitive, neuter, plural of śastra

śastra - weapon, arm, knife

अथ (atha) - then, now, moreover

(indeclinable)

ताम् (tām) - that (feminine singular)

(pronoun)

Accusative, feminine, singular of tad

tad - that, she, it

वृष्टिं (vṛṣṭiṁ) - shower/volley (of weapons) (shower, rain, volley)

(noun)

Accusative, feminine, singular of vṛṣṭi

vṛṣṭi - rain, shower, fall (of objects)

शलभानाम् (śalabhānām) - of locusts, of grasshoppers

(noun)

Genitive, masculine, plural of śalabha

śalabha - locust, grasshopper

इव (iva) - like, as, as if

(indeclinable)

आयतिम् (āyatim) - swarm, incoming multitude (of locusts) (approach, coming, swarm)

(noun)

Accusative, feminine, singular of āyati

āyati - approach, coming, future, swarm, multitude

from root yam (to go, restrain) with prefix ā

Prefix: ā

Root: yam (class 1)

रुरोध (rurodha) - he obstructed, he checked, he stopped

(verb)

3rd person , singular, active, perfect (lit) of rudh

Perfect Active

Perfect, 3rd person, singular, active voice of root rudh

Root: rudh (class 7)

सर्वतः (sarvataḥ) - from all sides, all around

(indeclinable)

पार्थः (pārthaḥ) - Arjuna (son of Pṛthā, Arjuna)

(proper noun)

Nominative, masculine, singular of pārtha

pārtha - son of Pṛthā (Kuntī), Arjuna

patronymic from Pṛthā

शरैः (śaraiḥ) - by arrows

(noun)

Instrumental, masculine, plural of śara

śara - arrow, reed

कनकभूषणैः (kanakabhūṣaṇaiḥ) - by (arrows) having gold ornaments/decoration (by those adorned with gold, by those having gold ornaments)

(adjective)

Instrumental, masculine, plural of kanakabhūṣaṇa

kanakabhūṣaṇa - gold ornament/decoration, adorned with gold

Compound type : tatpuruṣa/bahuvrihi (possessive or descriptive) (kanaka+bhūṣaṇa)

• kanaka – gold
  noun (neuter)
• bhūṣaṇa – ornament, decoration
  noun (neuter)
  from root bhūṣ (to adorn)
  Root: bhūṣ (class 10)

Note: modifies 'śaraiḥ'