महाभारतः mahābhārataḥ - book-5, chapter-123, verse-3

अकृत्वा वचनं तात केशवस्य महात्मनः ।
श्रेयो न जातु न सुखं न कल्याणमवाप्स्यसि ॥३॥

3. akṛtvā vacanaṁ tāta keśavasya mahātmanaḥ ,
śreyo na jātu na sukhaṁ na kalyāṇamavāpsyasi.

3. akṛtvā vacanam tāta keśavasya mahātmanaḥ
śreyaḥ na jātu na sukham na kalyāṇam avāpsyasi

3. My dear (son), by not following the advice of the great-souled Keśava (Kṛṣṇa), you will certainly never attain what is good, nor happiness, nor well-being.

Words meanings summery:

• अकृत्वा (akṛtvā) - without having done, not having heeded, having not done

• वचनम् (vacanam) - word, advice, speech

• तात (tāta) - dear one, my son (form of address)

• केशवस्य (keśavasya) - of Keśava, of Kṛṣṇa

• महात्मनः (mahātmanaḥ) - of the great-souled one, of the noble-minded

• श्रेयः (śreyaḥ) - good, welfare, auspiciousness, supreme good

• न (na) - not

• जातु (jātu) - ever, at any time

• न (na) - nor

• सुखम् (sukham) - happiness, pleasure

• न (na) - nor

• कल्याणम् (kalyāṇam) - well-being, auspiciousness, good fortune

• अवाप्स्यसि (avāpsyasi) - you will obtain, you will attain

Words meanings and morphology

अकृत्वा (akṛtvā) - without having done, not having heeded, having not done

(indeclinable)

Absolutive (gerund)

formed from a- + √kṛ + tvā

Prefix: a

Root: kṛ (class 8)

वचनम् (vacanam) - word, advice, speech

(noun)

Accusative, neuter, singular of vacana

vacana - word, speech, saying, advice

derived from √vac

Root: vac (class 2)

Note: Object of `akṛtvā`.

तात (tāta) - dear one, my son (form of address)

(noun)

Vocative, masculine, singular of tāta

tāta - father, dear one, son

केशवस्य (keśavasya) - of Keśava, of Kṛṣṇa

(proper noun)

Genitive, masculine, singular of keśava

keśava - Keśava (an epithet of Kṛṣṇa), having beautiful hair

Note: Qualifies `vacanam` and `mahātmanaḥ`.

महात्मनः (mahātmanaḥ) - of the great-souled one, of the noble-minded

(adjective)

Genitive, masculine, singular of mahātman

mahātman - great-souled, noble-minded, exalted

Compound type : bahuvrīhi (mahat+ātman)

• mahat – great, large
  adjective (neuter)
• ātman – self, soul, spirit
  noun (masculine)
  Root: an (class 2)

Note: Qualifies `keśavasya`.

श्रेयः (śreyaḥ) - good, welfare, auspiciousness, supreme good

(noun)

Accusative, neuter, singular of śreyas

śreyas - good, excellent, welfare, supreme good

comparative of śrī (good fortune)

Note: Object of `avāpsyasi`.

न (na) - not

(indeclinable)

जातु (jātu) - ever, at any time

(indeclinable)

न (na) - nor

(indeclinable)

सुखम् (sukham) - happiness, pleasure

(noun)

Accusative, neuter, singular of sukha

sukha - happiness, pleasure, ease

Note: Object of `avāpsyasi`.

न (na) - nor

(indeclinable)

कल्याणम् (kalyāṇam) - well-being, auspiciousness, good fortune

(noun)

Accusative, neuter, singular of kalyāṇa

kalyāṇa - beautiful, good, auspicious, well-being

Note: Object of `avāpsyasi`.

अवाप्स्यसि (avāpsyasi) - you will obtain, you will attain

(verb)

2nd person , singular, active, future (lṛṭ) of avāp

Future Tense

Future 2nd singular active, from ava-√āp

Prefix: ava

Root: āp (class 5)