महाभारतः mahābhārataḥ - book-5, chapter-88, verse-20

राजर्षीणां पुराणानां धुरं धत्ते दुरुद्वहाम् ।
शीलवृत्तोपसंपन्नो धर्मज्ञः सत्यसंगरः ॥२०॥

20. rājarṣīṇāṁ purāṇānāṁ dhuraṁ dhatte durudvahām ,
śīlavṛttopasaṁpanno dharmajñaḥ satyasaṁgaraḥ.

20. rājarṣīṇām purāṇānām dhuram dhatte durudvahām
śīlavṛttopasaṃpannaḥ dharmajñaḥ satyasaṅgaraḥ

20. He bears the difficult-to-sustain burden (responsibility) of the ancient royal sages (rājarṣis). He is endowed with good character and conduct, understands the natural law (dharma), and is true to his promises.

Words meanings summery:

• राजर्षीणाम् (rājarṣīṇām) - of the royal sages, of the kingly seers

• पुराणानाम् (purāṇānām) - of the ancient, of the old, of the former

• धुरम् (dhuram) - burden, yoke, responsibility

• धत्ते (dhatte) - bears, holds, maintains

• दुरुद्वहाम् (durudvahām) - difficult to bear, hard to sustain

• शीलवृत्तोपसंपन्नः (śīlavṛttopasaṁpannaḥ) - endowed with good character and conduct

• धर्मज्ञः (dharmajñaḥ) - knower of natural law, acquainted with duty (dharma)

• सत्यसङ्गरः (satyasaṅgaraḥ) - true to his vows, firm in his promises

Words meanings and morphology

राजर्षीणाम् (rājarṣīṇām) - of the royal sages, of the kingly seers

(noun)

Genitive, masculine, plural of rājarṣi

rājarṣi - royal sage, kingly seer

Compound type : tatpurusha (rājan+ṛṣi)

• rājan – king, ruler, sovereign
  noun (masculine)
• ṛṣi – seer, sage, inspired poet, Vedic singer
  noun (masculine)

पुराणानाम् (purāṇānām) - of the ancient, of the old, of the former

(adjective)

Genitive, masculine, plural of purāṇa

purāṇa - ancient, old, former; a class of sacred texts

धुरम् (dhuram) - burden, yoke, responsibility

(noun)

Accusative, feminine, singular of dhur

dhur - yoke, burden, responsibility, front part of a carriage

धत्ते (dhatte) - bears, holds, maintains

(verb)

3rd person , singular, middle, present (laṭ) of dhā

Root: dhā (class 3)

दुरुद्वहाम् (durudvahām) - difficult to bear, hard to sustain

(adjective)

Accusative, feminine, singular of durudvaha

durudvaha - difficult to bear, hard to carry, heavy

Compound type : tatpurusha (dur+udvaha)

• dur – difficult, bad, hard
  indeclinable
• udvaha – carrying, bearing, causing
  adjective (masculine)
  From root vah (to carry) with upasarga ud
  Prefix: ud
  Root: vah (class 1)

शीलवृत्तोपसंपन्नः (śīlavṛttopasaṁpannaḥ) - endowed with good character and conduct

(adjective)

Nominative, masculine, singular of śīlavṛttopasaṃpanna

śīlavṛttopasaṁpanna - endowed with good character and conduct

Compound type : bahuvrihi (śīla+vṛtta+upasaṃpanna)

• śīla – character, habit, good conduct, moral disposition
  noun (neuter)
• vṛtta – conduct, behavior, course, action
  noun (neuter)
  Past Passive Participle (when used as adj.)
  From root vṛt (to turn, exist)
  Root: vṛt (class 1)
• upasaṃpanna – endowed with, furnished with, possessed of, fallen into
  adjective (masculine)
  Past Passive Participle
  From root pad (to go) with upasargas upa and sam
  Prefixes: upa+sam
  Root: pad (class 4)

धर्मज्ञः (dharmajñaḥ) - knower of natural law, acquainted with duty (dharma)

(adjective)

Nominative, masculine, singular of dharmajña

dharmajña - knower of dharma, righteous, knowing justice/duty

Compound type : tatpurusha (dharma+jña)

• dharma – natural law, constitution, intrinsic nature, righteousness, duty, virtue, religion
  noun (masculine)
• jña – knowing, conversant with, skilled in; knower, expert
  adjective (masculine)
  Agent noun/adjective
  From root jñā (to know)
  Root: jñā (class 9)

सत्यसङ्गरः (satyasaṅgaraḥ) - true to his vows, firm in his promises

(adjective)

Nominative, masculine, singular of satyasaṅgara

satyasaṅgara - true to one's promise, firm in one's word

Compound type : bahuvrihi (satya+saṅgara)

• satya – truth, true, real, sincere
  noun (neuter)
• saṅgara – promise, vow, agreement, declaration
  noun (masculine)
  From root gṛ (to swallow) with upasarga sam
  Prefix: sam
  Root: gṛ (class 6)