योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-37, verse-21

भुशुण्डीमण्डलोद्द्योतश्यामार्कोत्पातभीरुषु ।
आभीरेष्वरयः पेतुर्गोगणा हरितेष्विव ॥ २१ ॥

bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīruṣu ,
ābhīreṣvarayaḥ peturgogaṇā hariteṣviva 21

21. bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīruṣu
ābhīreṣu arayaḥ petuḥ gogaṇāḥ hariteṣu iva

21. bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīruṣu
ābhīreṣu arayaḥ gogaṇāḥ hariteṣu iva petuḥ

21. Enemies attacked the Ābhīras, who were terrified by the ominous, dark sun-like glow of the muskets' formations, just as herds of cows descend upon green pastures.

Words meanings summery:

• भुशुण्डीमण्डलोद्द्योतश्यामार्कोत्पातभीरुषु (bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīruṣu) - upon those fearful of the ominous dark sun-like gleam of formations of muskets

• आभीरेषु (ābhīreṣu) - upon the Ābhīras (a tribe/people)

• अरयः (arayaḥ) - enemies

• पेतुः (petuḥ) - they fell, they attacked

• गोगणाः (gogaṇāḥ) - herds of cows

• हरितेषु (hariteṣu) - upon the green (pastures, fields)

• इव (iva) - like, as, as if

Words meanings and morphology

भुशुण्डीमण्डलोद्द्योतश्यामार्कोत्पातभीरुषु (bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīruṣu) - upon those fearful of the ominous dark sun-like gleam of formations of muskets

(adjective)

Locative, masculine, plural of bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīru

bhuśuṇḍīmaṇḍaloddyotaśyāmārkotpātabhīru - fearful of the ominous dark sun-like gleam of musket formations

Compound type : bahuvrihi (bhuśuṇḍī+maṇḍala+uddyota+śyāma+arka+utpāta+bhīru)

• bhuśuṇḍī – musket, sling, a type of projectile weapon
  noun (feminine)
• maṇḍala – circle, mass, group, formation
  noun (neuter)
• uddyota – gleam, splendor, light
  noun (masculine)
  Prefix: ut
  Root: dyut (class 1)
• śyāma – dark, black, dark-blue
  adjective
• arka – sun
  noun (masculine)
• utpāta – omen, portent, calamity, sudden event
  noun (masculine)
  Prefix: ut
  Root: pat (class 1)
• bhīru – fearful, timid
  adjective
  Root: bhī (class 3)

आभीरेषु (ābhīreṣu) - upon the Ābhīras (a tribe/people)

(proper noun)

Locative, masculine, plural of ābhīra

ābhīra - a member of the Ābhīra tribe, cowherd

अरयः (arayaḥ) - enemies

(noun)

Nominative, masculine, plural of ari

ari - enemy, foe, opponent

Root: ṛ (class 1)

पेतुः (petuḥ) - they fell, they attacked

(verb)

3rd person , plural, active, perfect (lit) of pat

Root: pat (class 1)

गोगणाः (gogaṇāḥ) - herds of cows

(noun)

Nominative, masculine, plural of gogaṇa

gogaṇa - herd of cows, multitude of cattle

Compound type : tatpurusha (go+gaṇa)

• go – cow, ox, cattle
  noun (masculine/feminine)
• gaṇa – herd, multitude, group, troop
  noun (masculine)

हरितेषु (hariteṣu) - upon the green (pastures, fields)

(adjective)

Locative, neuter, plural of harita

harita - green, yellowish, verdant

इव (iva) - like, as, as if

(indeclinable)