महाभारतः mahābhārataḥ - book-12, chapter-315, verse-57

एतावदुक्त्वा वचनं पराशरसुतः प्रभुः ।
उक्त्वा पुत्रमधीष्वेति व्योमगङ्गामयात्तदा ॥५७॥

57. etāvaduktvā vacanaṁ parāśarasutaḥ prabhuḥ ,
uktvā putramadhīṣveti vyomagaṅgāmayāttadā.

57. etāvat uktvā vacanam parāśarasutaḥ prabhuḥ
uktvā putram adhīṣva iti vyomagangām ayāt tadā

57. parāśarasutaḥ prabhuḥ etāvat vacanam uktvā
putram adhīṣva iti uktvā tadā vyomagangām ayāt

57. Having spoken these words, the powerful son of Parashara (Vyasa), after instructing his son, "Study!", then went to the celestial Ganga.

Words meanings summery:

• एतावत् (etāvat) - so much, thus much, these

• उक्त्वा (uktvā) - having said, having spoken

• वचनम् (vacanam) - word, speech, statement

• पराशरसुतः (parāśarasutaḥ) - Vyasa, the compiler of the Vedas and Puranas (son of Parashara)

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

• उक्त्वा (uktvā) - having said, having spoken

• पुत्रम् (putram) - son

• अधीष्व (adhīṣva) - study, learn

• इति (iti) - thus, so (quotative particle)

• व्योमगन्गाम् (vyomagangām) - celestial Ganga, river in the sky

• अयात् (ayāt) - went

• तदा (tadā) - then, at that time

Words meanings and morphology

एतावत् (etāvat) - so much, thus much, these

(indeclinable)

Note: Used adverbially here.

उक्त्वा (uktvā) - having said, having spoken

(indeclinable)

absolutive

Absolutive formed from root vac (which uses uktā/uktvā forms for past passive participle basis)

Root: vac (class 2)

वचनम् (vacanam) - word, speech, statement

(noun)

Accusative, neuter, singular of vacana

vacana - word, speech, statement

From root vac (to speak)

Root: vac (class 2)

पराशरसुतः (parāśarasutaḥ) - Vyasa, the compiler of the Vedas and Puranas (son of Parashara)

(noun)

Nominative, masculine, singular of parāśarasuta

parāśarasuta - son of Parashara

Compound type : tatpurusha (parāśara+suta)

• parāśara – name of a sage
  proper noun (masculine)
• suta – son
  noun (masculine)

प्रभुः (prabhuḥ) - master, lord, powerful one

(noun)

Nominative, masculine, singular of prabhu

prabhu - master, lord, powerful one

Prefix: pra

Root: bhū (class 1)

उक्त्वा (uktvā) - having said, having spoken

(indeclinable)

absolutive

Absolutive formed from root vac (which uses uktā/uktvā forms for past passive participle basis)

Root: vac (class 2)

पुत्रम् (putram) - son

(noun)

Accusative, masculine, singular of putra

putra - son

अधीष्व (adhīṣva) - study, learn

(verb)

2nd person , singular, middle, imperative (loṭ) of adhi-i

Prefix: adhi

Root: i (class 2)

इति (iti) - thus, so (quotative particle)

(indeclinable)

व्योमगन्गाम् (vyomagangām) - celestial Ganga, river in the sky

(noun)

Accusative, feminine, singular of vyomagangā

vyomagangā - celestial Ganga, river in the sky

Compound type : tatpurusha (vyoman+gangā)

• vyoman – sky, atmosphere
  noun (neuter)
• gangā – Ganga river
  proper noun (feminine)

अयात् (ayāt) - went

(verb)

3rd person , singular, active, imperfect (laṅ) of yā

Root: yā (class 2)

तदा (tadā) - then, at that time

(indeclinable)