महाभारतः mahābhārataḥ - book-5, chapter-49, verse-16

यः प्रमाणं महाराज धर्मे धर्मभृतां वरः ।
अजातशत्रुणा तेन पाण्डवा अभ्ययुञ्जत ॥१६॥

16. yaḥ pramāṇaṁ mahārāja dharme dharmabhṛtāṁ varaḥ ,
ajātaśatruṇā tena pāṇḍavā abhyayuñjata.

16. yaḥ pramāṇam mahārāja dharme dharmabhṛtām
varaḥ ajātaśatruṇā tena pāṇḍavāḥ abhyayuñjata

16. O great king, the Pāṇḍavas engaged with him, Ajātaśatru, who is the ultimate authority in matters of natural law (dharma) and the best among those who uphold natural law (dharma).

Words meanings summery:

• यः (yaḥ) - Refers to Ajātaśatru (Yudhiṣṭhira). (who, whoever)

• प्रमाणम् (pramāṇam) - Here, an ultimate authority in matters of dharma. (authority, standard, proof, measure)

• महाराज (mahārāja) - Addressed to Dhṛtarāṣṭra. (O great king)

• धर्मे (dharme) - In the sphere of dharma (natural law/righteousness). (in natural law (dharma), in righteousness, in duty)

• धर्मभृताम् (dharmabhṛtām) - Refers to righteous individuals. (of those who uphold natural law (dharma))

• वरः (varaḥ) - Predicative adjective for Yudhiṣṭhira. (best, excellent, choicest)

• अजातशत्रुणा (ajātaśatruṇā) - Refers to Yudhiṣṭhira, the eldest Pāṇḍava. (by Ajātaśatru (one who has no enemies))

• तेन (tena) - Refers to Ajātaśatru, reinforcing the instrumental. (by him, with him)

• पाण्डवाः (pāṇḍavāḥ) - The five sons of Pāṇḍu. (the sons of Pāṇḍu, the Pāṇḍavas)

• अभ्ययुञ्जत (abhyayuñjata) - Refers to engaging in battle or conflict. (they engaged, they fought, they yoked themselves)

Words meanings and morphology

यः (yaḥ) - Refers to Ajātaśatru (Yudhiṣṭhira). (who, whoever)

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what (relative pronoun)

Note: Co-refers with tena to Ajātaśatru.

प्रमाणम् (pramāṇam) - Here, an ultimate authority in matters of dharma. (authority, standard, proof, measure)

(noun)

Nominative, neuter, singular of pramāṇa

pramāṇa - authority, proof, standard, measure, right knowledge

From pra + root mā (to measure).

Prefix: pra

Root: mā (class 2)

महाराज (mahārāja) - Addressed to Dhṛtarāṣṭra. (O great king)

(noun)

Vocative, masculine, singular of mahārāja

mahārāja - great king, emperor

Compound of mahā (great) and rājan (king).

Compound type : karmadhāraya (mahā+rājan)

• mahā – great, mighty
  adjective
• rājan – king, ruler
  noun (masculine)

धर्मे (dharme) - In the sphere of dharma (natural law/righteousness). (in natural law (dharma), in righteousness, in duty)

(noun)

Locative, masculine, singular of dharma

dharma - natural law, constitution, intrinsic nature, duty, righteousness, virtue

From root dhṛ (to uphold, sustain).

Root: dhṛ (class 1)

धर्मभृताम् (dharmabhṛtām) - Refers to righteous individuals. (of those who uphold natural law (dharma))

(noun)

Genitive, masculine, plural of dharmabhṛt

dharmabhṛt - one who upholds natural law (dharma), righteous, virtuous

Compound of dharma and bhṛt (bearer/upholder, from root bhṛ).

Compound type : tatpuruṣa (dharma+bhṛt)

• dharma – natural law, constitution, intrinsic nature, duty, righteousness, virtue
  noun (masculine)
• bhṛt – bearing, upholding, maintaining, supporting
  adjective (kṛt affix) (masculine)
  Agent Noun/Adjective
  Derived from root bhṛ (to bear, support) with kvip suffix.
  Root: bhṛ (class 3)

वरः (varaḥ) - Predicative adjective for Yudhiṣṭhira. (best, excellent, choicest)

(adjective)

Nominative, masculine, singular of vara

vara - best, excellent, choicest, boon, bridegroom

From root vṛ (to choose).

Root: vṛ (class 5)

Note: Qualifies the implied subject (Yudhiṣṭhira).

अजातशत्रुणा (ajātaśatruṇā) - Refers to Yudhiṣṭhira, the eldest Pāṇḍava. (by Ajātaśatru (one who has no enemies))

(proper noun)

Instrumental, masculine, singular of ajātaśatru

ajātaśatru - one who has no enemies, name of Yudhiṣṭhira

Compound of a (not), jāta (born), śatru (enemy). One for whom no enemy has been born.

Compound type : bahuvrīhi (a+jāta+śatru)

• a – not, un-
  indeclinable
  Negative prefix.
• jāta – born, produced, arisen
  participle (adjective) (masculine)
  Past Passive Participle
  From root jan (to be born) with kta suffix.
  Root: jan (class 4)
• śatru – enemy, foe
  noun (masculine)

Note: Agent of abhyayuñjata.

तेन (tena) - Refers to Ajātaśatru, reinforcing the instrumental. (by him, with him)

(pronoun)

Instrumental, masculine, singular of tad

tad - that, he, she, it

Demonstrative/correlative pronoun.

पाण्डवाः (pāṇḍavāḥ) - The five sons of Pāṇḍu. (the sons of Pāṇḍu, the Pāṇḍavas)

(proper noun)

Nominative, masculine, plural of pāṇḍava

pāṇḍava - descendant of Pāṇḍu, son of Pāṇḍu

Derived from Pāṇḍu with aṇ suffix (patronymic).

Note: Subject of abhyayuñjata.

अभ्ययुञ्जत (abhyayuñjata) - Refers to engaging in battle or conflict. (they engaged, they fought, they yoked themselves)

(verb)

3rd person , plural, middle, past imperfect (laṅ) of abhiyuj

Imperfect Tense (Laṅ), Middle Voice (ātmanepada)

3rd person plural. Root yuj with prefix abhi.

Prefix: abhi

Root: yuj (class 7)