महाभारतः mahābhārataḥ - book-4, chapter-26, verse-8

यथावत्पाण्डुपुत्राणां सर्वार्थेषु धृतात्मनाम् ।
दुर्ज्ञेयाः खलु शूरास्ते अपापास्तपसा वृताः ॥८॥

8. yathāvatpāṇḍuputrāṇāṁ sarvārtheṣu dhṛtātmanām ,
durjñeyāḥ khalu śūrāste apāpāstapasā vṛtāḥ.

8. yathāvat pāṇḍuputrāṇām sarvārtheṣu dhṛtātmanām
| durjñeyāḥ khalu śūrāḥ te apāpāḥ tapasā vṛtāḥ

8. The sons of Pāṇḍu, who are resolute in all their endeavors, are indeed difficult to know. Those heroes are sinless and endowed with ascetic power (tapas).

Words meanings summery:

• यथावत् (yathāvat) - truly, indeed (as it should be, properly, accurately, truly)

• पाण्डुपुत्राणाम् (pāṇḍuputrāṇām) - of the sons of Pāṇḍu

• सर्वार्थेषु (sarvārtheṣu) - in all endeavors (in all matters, in all objects, in all purposes)

• धृतात्मनाम् (dhṛtātmanām) - of those who are resolute (of those whose inner self (ātman) is held/controlled, of those with resolute minds)

• दुर्ज्ञेयाः (durjñeyāḥ) - difficult to know (difficult to know, hard to understand)

• खलु (khalu) - indeed (indeed, certainly, surely, truly)

• शूराः (śūrāḥ) - heroes (heroes, brave men, warriors)

• ते (te) - those (they, those (masculine plural nominative))

• अपापाः (apāpāḥ) - sinless (sinless, faultless, innocent)

• तपसा (tapasā) - by ascetic power (tapas) (by asceticism, by penance, by spiritual fervor)

• वृताः (vṛtāḥ) - endowed with (covered, surrounded, endowed with, chosen)

Words meanings and morphology

यथावत् (yathāvat) - truly, indeed (as it should be, properly, accurately, truly)

(indeclinable)

Derived from yathā + vat suffix, indicating similarity or manner.

पाण्डुपुत्राणाम् (pāṇḍuputrāṇām) - of the sons of Pāṇḍu

(noun)

Genitive, masculine, plural of pāṇḍuputra

pāṇḍuputra - son of Pāṇḍu

Compound type : tatpuruṣa (pāṇḍu+putra)

• pāṇḍu – Pāṇḍu (name of a king, father of the Pāṇḍavas)
  proper noun (masculine)
• putra – son
  noun (masculine)

सर्वार्थेषु (sarvārtheṣu) - in all endeavors (in all matters, in all objects, in all purposes)

(noun)

Locative, masculine, plural of sarvārtha

sarvārtha - all objects, all purposes, all meanings, all wealth

Compound type : tatpuruṣa (sarva+artha)

• sarva – all, every
  adjective
• artha – purpose, object, meaning, wealth
  noun (masculine)

धृतात्मनाम् (dhṛtātmanām) - of those who are resolute (of those whose inner self (ātman) is held/controlled, of those with resolute minds)

(adjective)

Genitive, masculine, plural of dhṛtātman

dhṛtātman - self-controlled, resolute, firm in mind

Compound type : bahuvrīhi (dhṛta+ātman)

• dhṛta – held, supported, borne, controlled
  adjective (masculine)
  Past Passive Participle
  Derived from root √dhṛ (to hold, bear)
  Root: dhṛ (class 1)
• ātman – self, soul, spirit, individual self
  noun (masculine)

दुर्ज्ञेयाः (durjñeyāḥ) - difficult to know (difficult to know, hard to understand)

(adjective)

Nominative, masculine, plural of durjñeya

durjñeya - difficult to know or understand, incomprehensible

Gerundive (kṛtya)

Formed with prefix dur- (difficult) + root √jñā (to know) + eya suffix.

Prefix: dur

Root: jñā (class 9)

खलु (khalu) - indeed (indeed, certainly, surely, truly)

(indeclinable)

शूराः (śūrāḥ) - heroes (heroes, brave men, warriors)

(noun)

Nominative, masculine, plural of śūra

śūra - hero, brave, valiant, warrior

ते (te) - those (they, those (masculine plural nominative))

(pronoun)

Nominative, masculine, plural of tad

tad - that, those, he, she, it, they

अपापाः (apāpāḥ) - sinless (sinless, faultless, innocent)

(adjective)

Nominative, masculine, plural of apāpa

apāpa - sinless, virtuous, innocent

Formed with negative prefix a- + pāpa.

Compound type : nañ-tatpuruṣa (a+pāpa)

• a – not, un-, non-
  indeclinable
  Negative prefix
• pāpa – sin, evil, wicked
  noun (neuter)

तपसा (tapasā) - by ascetic power (tapas) (by asceticism, by penance, by spiritual fervor)

(noun)

Instrumental, neuter, singular of tapas

tapas - asceticism, penance, spiritual fervor, heat

From root √tap (to heat, to perform austerities)

Root: tap (class 1)

वृताः (vṛtāḥ) - endowed with (covered, surrounded, endowed with, chosen)

(adjective)

Nominative, masculine, plural of vṛta

vṛta - covered, surrounded, chosen, appointed, existing

Past Passive Participle

From root √vṛ (to cover, surround, choose)

Root: vṛ (class 5)