महाभारतः mahābhārataḥ - book-1, chapter-102, verse-18

इतिहासपुराणेषु नानाशिक्षासु चाभिभो ।
वेदवेदाङ्गतत्त्वज्ञाः सर्वत्र कृतनिश्रमाः ॥१८॥

18. itihāsapurāṇeṣu nānāśikṣāsu cābhibho ,
vedavedāṅgatattvajñāḥ sarvatra kṛtaniśramāḥ.

18. itihāsapurāṇeṣu nānāśikṣāsu ca abhibho
vedavedāṅgatattvajñāḥ sarvatra kṛtaniśramāḥ

18. O Lord, they were also experts in the epics (itihāsas) and ancient narratives (purāṇas), and in various teachings. They knew the essence of the Vedas and Vedāṅgas, having made efforts in all fields.

Words meanings summery:

• इतिहासपुराणेषु (itihāsapurāṇeṣu) - in the epics and ancient narratives

• नानाशिक्षासु (nānāśikṣāsu) - in various teachings, in diverse instructions

• च (ca) - and

• अभिभो (abhibho) - O lord, O master

• वेदवेदाङ्गतत्त्वज्ञाः (vedavedāṅgatattvajñāḥ) - knowers of the essence of the Vedas and Vedangas, those who understand the true nature of Vedic literature

• सर्वत्र (sarvatra) - everywhere, in all things, in all respects

• कृतनिश्रमाः (kṛtaniśramāḥ) - those who have made efforts, those who have exerted themselves diligently

Words meanings and morphology

इतिहासपुराणेषु (itihāsapurāṇeṣu) - in the epics and ancient narratives

(noun)

Locative, neuter, plural of itihāsapurāṇa

itihāsapurāṇa - epics and ancient narratives (itihāsa and purāṇa)

Compound type : dvandva (itihāsa+purāṇa)

• itihāsa – history, epic, legend
  noun (masculine)
  Prefixes: iti+ha+āsa
  Root: as (class 2)
• purāṇa – ancient narrative, old legend, traditional story
  noun (neuter)

नानाशिक्षासु (nānāśikṣāsu) - in various teachings, in diverse instructions

(noun)

Locative, feminine, plural of nānāśikṣā

nānāśikṣā - various teachings, diverse instructions

Compound type : karmadhāraya (nānā+śikṣā)

• nānā – various, diverse, manifold
  indeclinable
• śikṣā – instruction, teaching, training, study
  noun (feminine)
  Root: śikṣ (class 1)

च (ca) - and

(indeclinable)

अभिभो (abhibho) - O lord, O master

(noun)

Vocative, masculine, singular of abhibhu

abhibhu - lord, master, conqueror

Prefix: abhi

Root: bhū (class 1)

वेदवेदाङ्गतत्त्वज्ञाः (vedavedāṅgatattvajñāḥ) - knowers of the essence of the Vedas and Vedangas, those who understand the true nature of Vedic literature

(adjective)

Nominative, masculine, plural of vedavedāṅgatattvajña

vedavedāṅgatattvajña - knower of the essence of the Vedas and Vedangas

Compound type : tatpuruṣa (veda+vedāṅga+tattva+jña)

• veda – knowledge, sacred knowledge, sacred text
  noun (masculine)
  Root: vid (class 2)
• vedāṅga – limb of the Veda, auxiliary Vedic science
  noun (neuter)
• tattva – truth, reality, essence, principle
  noun (neuter)
• jña – knowing, understanding, expert
  adjective (masculine)
  Agent Noun Suffix
  Root: jñā (class 9)

सर्वत्र (sarvatra) - everywhere, in all things, in all respects

(indeclinable)

कृतनिश्रमाः (kṛtaniśramāḥ) - those who have made efforts, those who have exerted themselves diligently

(adjective)

Nominative, masculine, plural of kṛtaniśrama

kṛtaniśrama - one who has exerted oneself diligently, one who has made efforts

Compound type : bahuvrīhi (kṛta+niśrama)

• kṛta – done, made, performed
  adjective (masculine)
  Past Passive Participle
  Root: kṛ (class 8)
• niśrama – great effort, diligence, toil
  noun (masculine)
  Prefix: ni
  Root: śram (class 4)