महाभारतः mahābhārataḥ - book-14, chapter-41, verse-4

अध्यात्मज्ञाननित्यानां मुनीनां भावितात्मनाम् ।
स्वाध्यायक्रतुसिद्धानामेष लोकः सनातनः ॥४॥

4. adhyātmajñānanityānāṁ munīnāṁ bhāvitātmanām ,
svādhyāyakratusiddhānāmeṣa lokaḥ sanātanaḥ.

4. adhyātmajñānanityānām munīnām bhāvitātmanām
svādhyāyakratusiddhānām eṣaḥ lokaḥ sanātanaḥ

4. eṣaḥ sanātanaḥ lokaḥ adhyātmajñānanityānām
bhāvitātmanām svādhyāyakratusiddhānām munīnām

4. This eternal realm belongs to the sages (muni) who are constantly devoted to spiritual knowledge, whose selves (ātman) are purified, and who have achieved perfection through self-study and Vedic rituals (kratu).

Words meanings summery:

• अध्यात्मज्ञाननित्यानाम् (adhyātmajñānanityānām) - of those constantly devoted to spiritual knowledge

• मुनीनाम् (munīnām) - of the sages, of the ascetics

• भावितात्मनाम् (bhāvitātmanām) - of those whose selves are cultivated/purified

• स्वाध्यायक्रतुसिद्धानाम् (svādhyāyakratusiddhānām) - of those who have attained perfection through self-study and Vedic rituals

• एषः (eṣaḥ) - this

• लोकः (lokaḥ) - world, realm, abode

• सनातनः (sanātanaḥ) - eternal, everlasting, perpetual

Words meanings and morphology

अध्यात्मज्ञाननित्यानाम् (adhyātmajñānanityānām) - of those constantly devoted to spiritual knowledge

(adjective)

Genitive, masculine, plural of adhyātmajñānanitya

adhyātmajñānanitya - constantly devoted to spiritual knowledge, perpetually engaged in the knowledge of the self

A bahuvrihi compound meaning 'one for whom adhyātmajñāna is nitya'.

Compound type : bahuvrihi (adhyātma+jñāna+nitya)

• adhyātma – spiritual, relating to the self (ātman), highest self
  noun (neuter)
  Compound of adhi (over, concerning) and ātman (self).
  Prefix: adhi
• jñāna – knowledge, wisdom, understanding
  noun (neuter)
  Derived from root jñā (to know).
  Root: jñā (class 9)
• nitya – constant, eternal, perpetual, regular, devoted
  adjective

Note: Qualifies 'munīnām'.

मुनीनाम् (munīnām) - of the sages, of the ascetics

(noun)

Genitive, masculine, plural of muni

muni - sage, ascetic, seer, inspired person

Root: man

भावितात्मनाम् (bhāvitātmanām) - of those whose selves are cultivated/purified

(adjective)

Genitive, masculine, plural of bhāvitātman

bhāvitātman - one whose self (ātman) is cultivated, purified, developed

A bahuvrihi compound meaning 'one whose ātman is bhāvita'.

Compound type : bahuvrihi (bhāvita+ātman)

• bhāvita – cultivated, purified, developed, caused to be, brought into existence
  adjective
  Past Passive Participle
  Derived from the causative stem of root bhū (to be) + suffix -ta.
  Root: bhū (class 1)
• ātman – self, soul, spirit, essence
  noun (masculine)
  Root: an (class 2)

Note: Qualifies 'munīnām'.

स्वाध्यायक्रतुसिद्धानाम् (svādhyāyakratusiddhānām) - of those who have attained perfection through self-study and Vedic rituals

(adjective)

Genitive, masculine, plural of svādhyāyakratusiddha

svādhyāyakratusiddha - perfected or accomplished by self-study and Vedic ritual

A tatpurusha compound 'svādhyāya-kratu-siddha', where 'siddha' is qualified by 'svādhyāya' and 'kratu'.

Compound type : tatpurusha (svādhyāya+kratu+siddha)

• svādhyāya – self-study, recitation of sacred texts (Vedas)
  noun (masculine)
  Compound of sva (self) and adhyāya (study).
  Prefix: adhi
  Root: i (class 2)
• kratu – Vedic ritual, sacrifice, resolve, power
  noun (masculine)
  Root: kṛ (class 8)
• siddha – perfected, accomplished, achieved, successful
  adjective
  Past Passive Participle
  Derived from root sidh (to succeed, accomplish).
  Root: sidh (class 4)

Note: Qualifies 'munīnām'.

एषः (eṣaḥ) - this

(pronoun)

Nominative, masculine, singular of etad

etad - this, this one (demonstrative pronoun)

Masculine nominative singular form of 'etad'.

लोकः (lokaḥ) - world, realm, abode

(noun)

Nominative, masculine, singular of loka

loka - world, realm, region, people, folk

Root: lok (class 1)

Note: Subject of the implied verb 'is'.

सनातनः (sanātanaḥ) - eternal, everlasting, perpetual

(adjective)

Nominative, masculine, singular of sanātana

sanātana - eternal, everlasting, ancient, primeval, traditional

Derived from sanā (always) + tana (suffix indicating time).

Note: Qualifies 'lokaḥ'.