महाभारतः mahābhārataḥ - book-12, chapter-322, verse-50

ततस्ते लोकपितरः सर्वलोकार्थचिन्तकाः ।
प्रावर्तयन्त तच्छास्त्रं धर्मयोनिं सनातनम् ॥५०॥

50. tataste lokapitaraḥ sarvalokārthacintakāḥ ,
prāvartayanta tacchāstraṁ dharmayoniṁ sanātanam.

50. tataḥ te lokapitaraḥ sarvalokārthacintakāḥ
prāvartayanta tat śāstram dharmayonim sanātanam

50. tataḥ te lokapitaraḥ sarvalokārthacintakāḥ tat
sanātanam dharmayonim śāstram prāvartayanta

50. Thereafter, those progenitors of the world, who were concerned with the welfare of all beings, propagated that scripture, which was the eternal source of (dharma).

Words meanings summery:

• ततः (tataḥ) - then, thereafter, from that

• ते (te) - those, they

• लोकपितरः (lokapitaraḥ) - progenitors of the world, fathers of the world

• सर्वलोकार्थचिन्तकाः (sarvalokārthacintakāḥ) - concerned with the welfare of all worlds/beings

• प्रावर्तयन्त (prāvartayanta) - they caused to be propagated, they initiated, they set in motion

• तत् (tat) - that

• शास्त्रम् (śāstram) - scripture, teaching, treatise

• धर्मयोनिम् (dharmayonim) - the source of (dharma), origin of righteousness

• सनातनम् (sanātanam) - eternal, perpetual, ancient

Words meanings and morphology

ततः (tataḥ) - then, thereafter, from that

(indeclinable)

ते (te) - those, they

(pronoun)

Nominative, masculine, plural of tad

tad - that, he, she, it

लोकपितरः (lokapitaraḥ) - progenitors of the world, fathers of the world

(noun)

Nominative, masculine, plural of lokapitar

lokapitar - fathers of the world, progenitors of mankind, the creator gods

Compound type : tatpurusha (loka+pitar)

• loka – world, realm, people, universe
  noun (masculine)
• pitar – father, ancestor
  noun (masculine)

सर्वलोकार्थचिन्तकाः (sarvalokārthacintakāḥ) - concerned with the welfare of all worlds/beings

(adjective)

Nominative, masculine, plural of sarvalokārthacintaka

sarvalokārthacintaka - one who thinks of the welfare of all worlds

Compound type : bahuvrihi (sarva+loka+artha+cintaka)

• sarva – all, every, whole
  adjective (masculine)
• loka – world, realm, people
  noun (masculine)
• artha – purpose, meaning, object, wealth, welfare
  noun (masculine)
• cintaka – thinker, one who reflects, concerned with
  adjective (masculine)
  agent noun
  Derived from root cint (to think)
  Root: cint (class 10)

प्रावर्तयन्त (prāvartayanta) - they caused to be propagated, they initiated, they set in motion

(verb)

3rd person , plural, active, past imperfect (laṅ) of pra-vṛt

Imperfect Tense (Causative)

Root vṛt with prefix pra, causative stem 'pravartaya-'

Prefix: pra

Root: vṛt (class 1)

Note: Causative form.

तत् (tat) - that

(pronoun)

Accusative, neuter, singular of tad

tad - that, he, she, it

शास्त्रम् (śāstram) - scripture, teaching, treatise

(noun)

Accusative, neuter, singular of śāstra

śāstra - sacred precept, holy scripture, instruction, treatise, scientific or technical work

From root śās (to teach, to instruct)

Root: śās (class 2)

धर्मयोनिम् (dharmayonim) - the source of (dharma), origin of righteousness

(noun)

Accusative, feminine, singular of dharmayoni

dharmayoni - source of dharma, origin of righteousness, source of law

Compound type : tatpurusha (dharma+yoni)

• dharma – constitution, natural law, intrinsic nature, righteousness, duty, religious merit
  noun (masculine)
• yoni – womb, origin, source, place of birth, family
  noun (feminine)

सनातनम् (sanātanam) - eternal, perpetual, ancient

(adjective)

Accusative, neuter, singular of sanātana

sanātana - eternal, perpetual, constant, ancient, primeval

From sanā (always) + tana (suffix indicating time)