महाभारतः mahābhārataḥ - book-16, chapter-9, verse-21

येन पूर्वं प्रदग्धानि शत्रुसैन्यानि तेजसा ।
शरैर्गाण्डीवनिर्मुक्तैरहं पश्चाद्व्यनाशयम् ॥२१॥

21. yena pūrvaṁ pradagdhāni śatrusainyāni tejasā ,
śarairgāṇḍīvanirmuktairahaṁ paścādvyanāśayam.

21. yena pūrvam pradagdhāni śatrusainyāni tejasā
śaraiḥ gāṇḍīvanirmuktaiḥ aham paścāt vyanaśayam

21. yena tejasā pūrvam śatrusainyāni pradagdhāni
aham paścāt gāṇḍīvanirmuktaiḥ śaraiḥ vyanaśayam

21. By whose (Krishna's) prowess the enemy armies were previously incinerated, I subsequently annihilated them with arrows shot from the Gāṇḍīva bow.

Words meanings summery:

• येन (yena) - by whom (referring to Krishna's influence) (by whom, by which)

• पूर्वम् (pūrvam) - previously, formerly, before

• प्रदग्धानि (pradagdhāni) - burnt down, consumed, incinerated

• शत्रुसैन्यानि (śatrusainyāni) - enemy armies, hostile forces

• तेजसा (tejasā) - by prowess (by power, by might, by splendor, by glory)

• शरैः (śaraiḥ) - by arrows

• गाण्डीवनिर्मुक्तैः (gāṇḍīvanirmuktaiḥ) - released from the Gāṇḍīva (bow), shot from the Gāṇḍīva

• अहम् (aham) - I

• पश्चात् (paścāt) - subsequently (afterwards, later, behind)

• व्यनशयम् (vyanaśayam) - I destroyed, I annihilated

Words meanings and morphology

येन (yena) - by whom (referring to Krishna's influence) (by whom, by which)

(pronoun)

Instrumental, masculine, singular of yad

yad - which, what, who

पूर्वम् (pūrvam) - previously, formerly, before

(indeclinable)

Note: Adverbial usage

प्रदग्धानि (pradagdhāni) - burnt down, consumed, incinerated

(adjective)

Accusative, neuter, plural of pradagdha

pradagdha - burnt, consumed, destroyed by fire

Past Passive Participle

Derived from pra-√dah (to burn, consume) with the past passive participle suffix -kta

Prefix: pra

Root: dah (class 1)

Note: Past Passive Participle modifying 'śatrusainyāni'

शत्रुसैन्यानि (śatrusainyāni) - enemy armies, hostile forces

(noun)

Accusative, neuter, plural of śatrusainya

śatrusainya - enemy army

Compound type : tatpuruṣa (śatru+sainya)

• śatru – enemy, rival, foe
  noun (masculine)
• sainya – army, military force, host
  noun (neuter)

तेजसा (tejasā) - by prowess (by power, by might, by splendor, by glory)

(noun)

Instrumental, neuter, singular of tejas

tejas - brilliance, power, energy, spiritual energy, majesty

शरैः (śaraiḥ) - by arrows

(noun)

Instrumental, masculine, plural of śara

śara - arrow

गाण्डीवनिर्मुक्तैः (gāṇḍīvanirmuktaiḥ) - released from the Gāṇḍīva (bow), shot from the Gāṇḍīva

(adjective)

Instrumental, masculine, plural of gāṇḍīvanirmukta

gāṇḍīvanirmukta - released from Gāṇḍīva

Compound type : tatpuruṣa (gāṇḍīva+nirmukta)

• gāṇḍīva – Gāṇḍīva (Arjuna's bow)
  proper noun (neuter)
• nirmukta – released, set free, shot (of an arrow)
  adjective
  Past Passive Participle
  Derived from nir-√muc (to release, free) with the past passive participle suffix -kta
  Prefix: nir
  Root: muc (class 6)

Note: Past Passive Participle adjective modifying 'śaraiḥ'

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we

पश्चात् (paścāt) - subsequently (afterwards, later, behind)

(indeclinable)

व्यनशयम् (vyanaśayam) - I destroyed, I annihilated

(verb)

1st person , singular, active, past imperfect (laṅ) of vyanaśaya

Imperfect tense, active voice, 1st person singular

Derived from the root √naś (to perish, destroy) with prefix 'vi', in the imperfect tense (laṅ)

Prefix: vi

Root: naś (class 4)