महाभारतः mahābhārataḥ - book-3, chapter-205, verse-18

मातापितृभ्यां शुश्रूषां करिष्ये वचनात्तव ।
नाकृतात्मा वेदयति धर्माधर्मविनिश्चयम् ॥१८॥

18. mātāpitṛbhyāṁ śuśrūṣāṁ kariṣye vacanāttava ,
nākṛtātmā vedayati dharmādharmaviniścayam.

18. mātāpitṛbhyām śuśrūṣām kariṣye vacanāt tava
| na akṛtātmā vedayati dharmādharmaviniscayam

18. I shall render service to my parents according to your word. An undisciplined person (akṛtātman) does not discern the discrimination between righteous conduct (dharma) and unrighteous conduct (adharma).

Words meanings summery:

• मातापितृभ्याम् (mātāpitṛbhyām) - to (both) parents, for (both) parents

• शुश्रूषाम् (śuśrūṣām) - service, desire to hear or obey, attendance

• करिष्ये (kariṣye) - I shall do, I shall perform

• वचनात् (vacanāt) - from the word, according to the command

• तव (tava) - your, of you

• न (na) - not, no

• अकृतात्मा (akṛtātmā) - one whose self is not cultivated, undisciplined soul

• वेदयति (vedayati) - he knows, he discerns, he causes to know

• धर्माधर्मविनिस्चयम् (dharmādharmaviniscayam) - the discrimination between righteous and unrighteous conduct

Words meanings and morphology

मातापितृभ्याम् (mātāpitṛbhyām) - to (both) parents, for (both) parents

(noun)

Dative, dual of mātāpitṛ

mātāpitṛ - mother and father, parents

Compound type : dvandva (mātṛ+pitṛ)

• mātṛ – mother
  noun (feminine)
• pitṛ – father
  noun (masculine)

Note: Implies a dative sense 'for parents' or 'to parents' with 'service'.

शुश्रूषाम् (śuśrūṣām) - service, desire to hear or obey, attendance

(noun)

Accusative, feminine, singular of śuśrūṣā

śuśrūṣā - service, obedience, desire to hear

Desiderative nominal derivation from root śru (to hear).

Root: śru (class 5)

करिष्ये (kariṣye) - I shall do, I shall perform

(verb)

1st person , singular, middle, future (lṛṭ) of kṛ

Root: kṛ (class 8)

वचनात् (vacanāt) - from the word, according to the command

(noun)

Ablative, neuter, singular of vacana

vacana - word, speech, command, saying

From root vac (to speak).

Root: vac (class 2)

तव (tava) - your, of you

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you (second person pronoun)

Note: Possessive 'your'.

न (na) - not, no

(indeclinable)

अकृतात्मा (akṛtātmā) - one whose self is not cultivated, undisciplined soul

(noun)

Nominative, masculine, singular of akṛtātman

akṛtātman - uncultivated soul, undisciplined, one whose mind is not refined

Compound type : bahuvrīhi (akṛta+ātman)

• akṛta – undone, uncultivated, undeveloped
  adjective
  Past Passive Participle
  Negation prefix 'a' + root kṛ (to do) + kta suffix.
  Prefix: a
  Root: kṛ (class 8)
• ātman – self, soul, spirit, essence, mind (ātman)
  noun (masculine)

Note: Subject of 'vedayati'.

वेदयति (vedayati) - he knows, he discerns, he causes to know

(verb)

3rd person , singular, active, present (laṭ) of vid

Causative

From root vid (to know) in the 10th class (vid + ṇic + tiP).

Root: vid (class 10)

धर्माधर्मविनिस्चयम् (dharmādharmaviniscayam) - the discrimination between righteous and unrighteous conduct

(noun)

Accusative, masculine, singular of dharmādharmaviniscaya

dharmādharmaviniscaya - discrimination of dharma and adharma, decision concerning right and wrong

Compound type : tatpuruṣa (dharma+adharma+viniscaya)

• dharma – constitution, natural law, intrinsic nature, righteousness, duty, virtue (dharma)
  noun (masculine)
  From root dhṛ (to hold, support).
  Root: dhṛ (class 1)
• adharma – unrighteousness, unconstitutionality, vice, wrong conduct
  noun (masculine)
  Formed from 'a' (negation) + 'dharma'.
• viniscaya – decision, ascertainment, discrimination, certainty
  noun (masculine)
  From root ci (to gather, discern) with upasargas vi- and ni-.
  Prefixes: vi+ni
  Root: ci (class 5)

Note: Object of 'vedayati'.