महाभारतः mahābhārataḥ - book-12, chapter-315, verse-16

नारदस्य वचः श्रुत्वा कृष्णद्वैपायनोऽब्रवीत् ।
महर्षे यत्त्वया प्रोक्तं वेदवादविचक्षण ॥१६॥

16. nāradasya vacaḥ śrutvā kṛṣṇadvaipāyano'bravīt ,
maharṣe yattvayā proktaṁ vedavādavicakṣaṇa.

16. nāradasya vacaḥ śrutvā kṛṣṇadvaipāyanaḥ abravīt
maharṣe yat tvayā proktam vedavādavicakṣaṇa

16. nāradasya vacaḥ śrutvā kṛṣṇadvaipāyanaḥ abravīt (iti) "maharṣe,
vedavādavicakṣaṇa,
yat tvayā proktam.
.
.
"

16. Having heard the words of Narada, Krishna Dvaipayana said: 'O great sage (mahārṣi), O expert in Vedic discourse, that which has been spoken by you...'

Words meanings summery:

• नारदस्य (nāradasya) - of Narada

• वचः (vacaḥ) - word, speech, utterance

• श्रुत्वा (śrutvā) - having heard

• कृष्णद्वैपायनः (kṛṣṇadvaipāyanaḥ) - Krishna Dvaipayana (Vyasa)

• अब्रवीत् (abravīt) - spoke, said

• महर्षे (maharṣe) - O great sage Narada! (O great sage!)

• यत् (yat) - what, which, that which

• त्वया (tvayā) - by you

• प्रोक्तम् (proktam) - said, spoken, declared

• वेदवादविचक्षण (vedavādavicakṣaṇa) - O Narada, expert in Vedic teachings and debates! (O expert in Vedic discourse!)

Words meanings and morphology

नारदस्य (nāradasya) - of Narada

(proper noun)

Genitive, masculine, singular of nārada

nārada - Narada (a divine sage, son of Brahma)

Note: Possessive, "of Narada".

वचः (vacaḥ) - word, speech, utterance

(noun)

Accusative, neuter, singular of vacas

vacas - word, speech, saying, utterance

Root: vac (class 2)

Note: Object of śrutvā.

श्रुत्वा (śrutvā) - having heard

(indeclinable)

Absolutive (gerund)

From root śru + ktvā suffix.

Root: śru (class 5)

Note: Absolutive form, functions adverbially.

कृष्णद्वैपायनः (kṛṣṇadvaipāyanaḥ) - Krishna Dvaipayana (Vyasa)

(proper noun)

Nominative, masculine, singular of kṛṣṇadvaipāyana

kṛṣṇadvaipāyana - Krishna Dvaipayana (a name for Vyasa, meaning "dark-skinned island-born")

Compound.

Compound type : tatpurusha (kṛṣṇa+dvaipāyana)

• kṛṣṇa – dark, black, Krishna
  adjective (masculine)
  Root: kṛṣ (class 1)
• dvaipāyana – island-born, an inhabitant of an island
  noun (masculine)
  From dvīpa (island) + suffix āyana.

Note: Subject of abravīt.

अब्रवीत् (abravīt) - spoke, said

(verb)

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

Root brū (class 2). Imperfect third singular active.

Root: brū (class 2)

महर्षे (maharṣe) - O great sage Narada! (O great sage!)

(noun)

Vocative, masculine, singular of maharṣi

maharṣi - great sage

Compound.

Compound type : karmadharaya (mahat+ṛṣi)

• mahat – great, large, powerful
  adjective
  Root: mah (class 1)
• ṛṣi – sage, seer
  noun (masculine)
  Root: ṛṣ (class 1)

Note: Addresses Narada.

यत् (yat) - what, which, that which

(pronoun)

Nominative, neuter, singular of yad

yad - which, what, that

Note: Refers to what was said by Narada.

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of tvam

tvam - you (singular)

Note: Agent in passive construction (proktam).

प्रोक्तम् (proktam) - said, spoken, declared

(adjective)

Nominative, neuter, singular of prokta

prokta - spoken, said, declared, proclaimed

Past Passive Participle

From pra-vac (to speak forth, declare) + kta suffix. Root vac becomes ukta after prefixes.

Prefix: pra

Root: vac (class 2)

Note: Part of the passive clause "what has been said by you".

वेदवादविचक्षण (vedavādavicakṣaṇa) - O Narada, expert in Vedic teachings and debates! (O expert in Vedic discourse!)

(adjective)

Vocative, masculine, singular of vedavādavicakṣaṇa

vedavādavicakṣaṇa - expert in Vedic discourse/arguments

Compound.

Compound type : tatpurusha (vedavāda+vicakṣaṇa)

• vedavāda – Vedic discourse, discussion of the Vedas
  noun (masculine)
  Tatpurusha compound of veda and vāda.
• veda – sacred knowledge, Veda
  noun (masculine)
  From vid (to know) + a suffix.
  Root: vid (class 2)
• vāda – discourse, speech, argument, doctrine
  noun (masculine)
  From vad (to speak) + a suffix.
  Root: vad (class 1)
• vicakṣaṇa – skillful, clever, expert, discerning
  adjective
  From vi-cakṣ (to perceive clearly) + ana suffix.
  Prefix: vi
  Root: cakṣ (class 2)

Note: Addresses Narada.