महाभारतः mahābhārataḥ - book-14, chapter-57, verse-31

यदा स नाशकत्तस्य निश्चयं कर्तुमन्यथा ।
वज्रपाणिस्तदा दण्डं वज्रास्त्रेण युयोज ह ॥३१॥

31. yadā sa nāśakattasya niścayaṁ kartumanyathā ,
vajrapāṇistadā daṇḍaṁ vajrāstreṇa yuyoja ha.

31. yadā sa na aśakat tasya niścayam kartum anyathā
vajrapāṇiḥ tadā daṇḍam vajrāstreṇa yuyoja ha

31. yadā sa tasya niścayam anyathā kartum na aśakat,
tadā vajrapāṇiḥ vajrāstreṇa daṇḍam yuyoja ha

31. When he (Daṇḍa) could not be made to alter his firm resolve, then Vajrapāṇi (Indra) engaged that staff with his thunderbolt-weapon.

Words meanings summery:

• यदा (yadā) - when, at which time

• स (sa) - he (referring to Daṇḍa or the being whose resolve could not be altered) (he, that)

• न (na) - not

• अशकत् (aśakat) - was able to do (otherwise) (was able, could)

• तस्य (tasya) - his (referring to Daṇḍa's resolve) (his, its, of that)

• निश्चयम् (niścayam) - firm resolve (of Daṇḍa) (determination, resolve, certainty)

• कर्तुम् (kartum) - to alter, to change (to do, to make)

• अन्यथा (anyathā) - to do otherwise, to alter (the resolve) (otherwise, differently)

• वज्रपाणिः (vajrapāṇiḥ) - Vajrapāṇi (Indra) (thunderbolt-handed, an epithet of Indra)

• तदा (tadā) - then, at that time

• दण्डम् (daṇḍam) - the staff (personified as an entity or a weapon) (staff, stick, punishment, authority)

• वज्रास्त्रेण (vajrāstreṇa) - by his thunderbolt-weapon (by the thunderbolt-weapon)

• युयोज (yuyoja) - engaged, applied (employed, connected, yoked)

• ह (ha) - indeed, surely (an emphatic particle)

Words meanings and morphology

यदा (yadā) - when, at which time

(indeclinable)

स (sa) - he (referring to Daṇḍa or the being whose resolve could not be altered) (he, that)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

Note: Nominative singular masculine form of 'tad'.

न (na) - not

(indeclinable)

अशकत् (aśakat) - was able to do (otherwise) (was able, could)

(verb)

3rd person , singular, active, past imperfect (laṅ) of aś

Root: aś (class 5)

Note: Imperfect 3rd person singular active of root aś (to be able).

तस्य (tasya) - his (referring to Daṇḍa's resolve) (his, its, of that)

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

Note: Genitive singular masculine/neuter form of 'tad'.

निश्चयम् (niścayam) - firm resolve (of Daṇḍa) (determination, resolve, certainty)

(noun)

Accusative, masculine, singular of niścaya

niścaya - firm resolve, determination, certainty, decision

Derived from ni-√ci.

Prefix: ni

Root: ci (class 5)

कर्तुम् (kartum) - to alter, to change (to do, to make)

(indeclinable)

Infinitive

Infinitive form of root kṛ.

Root: kṛ (class 8)

Note: Infinitive (tum-suffix) form.

अन्यथा (anyathā) - to do otherwise, to alter (the resolve) (otherwise, differently)

(indeclinable)

वज्रपाणिः (vajrapāṇiḥ) - Vajrapāṇi (Indra) (thunderbolt-handed, an epithet of Indra)

(proper noun)

Nominative, masculine, singular of vajrapāṇi

vajrapāṇi - thunderbolt-handed, holding a thunderbolt (an epithet of Indra)

Compound type : bahuvrīhi (vajra+pāṇi)

• vajra – thunderbolt, diamond
  noun (neuter)
• pāṇi – hand
  noun (masculine)

तदा (tadā) - then, at that time

(indeclinable)

दण्डम् (daṇḍam) - the staff (personified as an entity or a weapon) (staff, stick, punishment, authority)

(noun)

Accusative, masculine, singular of daṇḍa

daṇḍa - staff, stick, rod, punishment, scepter, army

वज्रास्त्रेण (vajrāstreṇa) - by his thunderbolt-weapon (by the thunderbolt-weapon)

(noun)

Instrumental, neuter, singular of vajrāstra

vajrāstra - thunderbolt-weapon

Compound type : tatpuruṣa (vajra+astra)

• vajra – thunderbolt, diamond
  noun (neuter)
• astra – weapon, missile
  noun (neuter)

युयोज (yuyoja) - engaged, applied (employed, connected, yoked)

(verb)

3rd person , singular, active, past perfect (lit) of yuj

Root: yuj (class 7)

Note: Perfect 3rd person singular active of root yuj.

ह (ha) - indeed, surely (an emphatic particle)

(indeclinable)