महाभारतः mahābhārataḥ - book-7, chapter-57, verse-63

ततः पार्थस्य विज्ञाय वरार्थे वचनं प्रभुः ।
वासुदेवार्जुनौ देवः स्मयमानोऽभ्यभाषत ॥६३॥

63. tataḥ pārthasya vijñāya varārthe vacanaṁ prabhuḥ ,
vāsudevārjunau devaḥ smayamāno'bhyabhāṣata.

63. tataḥ pārthasya vijñāya varārthe vacanaṃ prabhuḥ
vāsudevārjunau devaḥ smayamānaḥ abhi abhāṣata

63. tataḥ prabhuḥ devaḥ pārthasya varārthe vacanaṃ
vijñāya smayamānaḥ vāsudevārjunau abhyabhāṣata

63. Then, the Lord (prabhu), the god (deva), having understood Arjuna's (pārtha) request for a boon (vara), spoke to Vāsudeva (Kṛṣṇa) and Arjuna, smiling.

Words meanings summery:

• ततः (tataḥ) - then, thereafter, from that

• पार्थस्य (pārthasya) - of Arjuna, of the son of Pṛthā

• विज्ञाय (vijñāya) - having known, having understood

• वरार्थे (varārthe) - for the sake of a boon, for the purpose of a boon

• वचनं (vacanaṁ) - request, plea (word, speech, utterance)

• प्रभुः (prabhuḥ) - Lord Śiva (lord, master, powerful one)

• वासुदेवार्जुनौ (vāsudevārjunau) - Vāsudeva (Kṛṣṇa) and Arjuna

• देवः (devaḥ) - Lord Śiva (god, deity)

• स्मयमानः (smayamānaḥ) - smiling, laughing gently

• अभि (abhi) - towards, to, upon

• अभाषत (abhāṣata) - he spoke

Words meanings and morphology

ततः (tataḥ) - then, thereafter, from that

(indeclinable)

ablative of tad, used as an indeclinable adverb

पार्थस्य (pārthasya) - of Arjuna, of the son of Pṛthā

(proper noun)

Genitive, masculine, singular of pārtha

pārtha - son of Pṛthā (Kuntī), Arjuna

derived from Pṛthā

विज्ञाय (vijñāya) - having known, having understood

(indeclinable)

absolutive / gerund

formed from root jñā with prefix vi and suffix -ya

Prefix: vi

Root: jñā (class 9)

वरार्थे (varārthe) - for the sake of a boon, for the purpose of a boon

(noun)

Locative, masculine, singular of varārtha

varārtha - purpose of a boon, sake of a boon

Compound type : tatpuruṣa (vara+artha)

• vara – boon, blessing, choice
  noun (masculine)
• artha – purpose, object, meaning, wealth
  noun (masculine)

Note: Often used adverbially as 'for the sake of'.

वचनं (vacanaṁ) - request, plea (word, speech, utterance)

(noun)

Accusative, neuter, singular of vacana

vacana - word, speech, saying, utterance

derived from root vac (to speak)

Root: vac (class 2)

प्रभुः (prabhuḥ) - Lord Śiva (lord, master, powerful one)

(noun)

Nominative, masculine, singular of prabhu

prabhu - lord, master, powerful, eminent

Prefix: pra

Root: bhū (class 1)

वासुदेवार्जुनौ (vāsudevārjunau) - Vāsudeva (Kṛṣṇa) and Arjuna

(proper noun)

Accusative, masculine, dual of vāsudevārjuna

vāsudevārjuna - Vāsudeva and Arjuna

Compound type : dvandva (vāsudeva+arjuna)

• vāsudeva – Vāsudeva (a name for Kṛṣṇa)
  proper noun (masculine)
  son of Vasudeva
• arjuna – Arjuna (a Pāṇḍava prince), white, clear
  proper noun (masculine)

देवः (devaḥ) - Lord Śiva (god, deity)

(noun)

Nominative, masculine, singular of deva

deva - god, deity, divine

Root: div (class 4)

स्मयमानः (smayamānaḥ) - smiling, laughing gently

(adjective)

Nominative, masculine, singular of smayamāna

smayamāna - smiling, laughing gently

present active participle (ātmepada)

formed from root smi (to smile) with the present participle suffix -māna

Root: smi (class 1)

अभि (abhi) - towards, to, upon

(indeclinable)

अभाषत (abhāṣata) - he spoke

(verb)

3rd person , singular, middle, aorist (luṅ) of bhāṣ

aorist middle

root bhāṣ, 1st class verb (ātmepada), aorist (luṅ) 3rd person singular with augment 'a'

Root: bhāṣ (class 1)