महाभारतः mahābhārataḥ - book-1, chapter-2, verse-50

ततः संजययानाख्यं पर्व ज्ञेयमतः परम् ।
प्रजागरं ततः पर्व धृतराष्ट्रस्य चिन्तया ॥५०॥

50. tataḥ saṁjayayānākhyaṁ parva jñeyamataḥ param ,
prajāgaraṁ tataḥ parva dhṛtarāṣṭrasya cintayā.

50. tataḥ sañjayayānākhyam parva jñeyam ataḥ param
| prajāgaram tataḥ parva dhṛtarāṣṭrasya cintayā

50. Then, after this, the chapter named Sañjayayāna should be known. Then comes the Prajāgara Parva, prompted by Dhṛtarāṣṭra's anxiety.

Words meanings summery:

• ततः (tataḥ) - then (from there, then, afterwards)

• सञ्जययानाख्यम् (sañjayayānākhyam) - the chapter named 'Sañjaya's Journey' (named Sañjayayāna)

• पर्व (parva) - chapter, book (of the Mahabharata) (knot, joint, section, chapter)

• ज्ञेयम् (jñeyam) - should be known (to be known, understood)

• अतः (ataḥ) - from this (point) (from this, hence, then)

• परम् (param) - after (this) (after, further, next, supreme)

• प्रजागरम् (prajāgaram) - The Prajāgara Parva (Book of Wakefulness/Vigil), a section of the Udhyoga Parva (waking, sleeplessness, wakefulness)

• ततः (tataḥ) - then (from there, then, afterwards)

• पर्व (parva) - chapter, book (of the Mahabharata) (knot, joint, section, chapter)

• धृतराष्ट्रस्य (dhṛtarāṣṭrasya) - of Dhṛtarāṣṭra (of Dhritarashtra)

• चिन्तया (cintayā) - due to anxiety (by thought, with anxiety, due to worry)

Words meanings and morphology

ततः (tataḥ) - then (from there, then, afterwards)

(indeclinable)

सञ्जययानाख्यम् (sañjayayānākhyam) - the chapter named 'Sañjaya's Journey' (named Sañjayayāna)

(adjective)

Nominative, neuter, singular of sañjayayānākhya

sañjayayānākhya - named Sañjayayāna

Compound type : bahuvrīhi (sañjayayāna+ākhya)

• sañjayayāna – Sañjaya's journey, the journey of Sañjaya
  noun (neuter)
• ākhya – named, called, denominated
  adjective (neuter)
  from root khyā with prefix ā
  Prefix: ā
  Root: khyā (class 2)

Note: Agrees with 'parva'.

पर्व (parva) - chapter, book (of the Mahabharata) (knot, joint, section, chapter)

(noun)

Nominative, neuter, singular of parvan

parvan - a knot, joint, section, division, chapter, book (especially of the Mahabharata)

ज्ञेयम् (jñeyam) - should be known (to be known, understood)

(participle)

Nominative, neuter, singular of jñeya

jñeya - to be known, understood, intelligible

future passive participle (gerundive)

from root jñā

Root: jñā (class 9)

Note: Implies an imperative: 'it should be known'.

अतः (ataḥ) - from this (point) (from this, hence, then)

(indeclinable)

परम् (param) - after (this) (after, further, next, supreme)

(adjective)

Nominative, neuter, singular of para

para - other, foreign, supreme, highest, further, next, subsequent

Note: Used adverbially to mean 'next' or 'subsequent'.

प्रजागरम् (prajāgaram) - The Prajāgara Parva (Book of Wakefulness/Vigil), a section of the Udhyoga Parva (waking, sleeplessness, wakefulness)

(noun)

Nominative, neuter, singular of prajāgara

prajāgara - waking, sleeplessness, vigil, wakefulness

action noun

from root jāgṛ with prefix pra

Prefix: pra

Root: jāgṛ (class 2)

ततः (tataḥ) - then (from there, then, afterwards)

(indeclinable)

पर्व (parva) - chapter, book (of the Mahabharata) (knot, joint, section, chapter)

(noun)

Nominative, neuter, singular of parvan

parvan - a knot, joint, section, division, chapter, book (especially of the Mahabharata)

धृतराष्ट्रस्य (dhṛtarāṣṭrasya) - of Dhṛtarāṣṭra (of Dhritarashtra)

(noun)

Genitive, masculine, singular of dhṛtarāṣṭra

dhṛtarāṣṭra - name of the blind king of Hastinapura, father of the Kauravas

Compound type : bahuvrīhi (dhṛta+rāṣṭra)

• dhṛta – held, borne, maintained, supported
  participle (masculine/feminine/neuter)
  past passive participle
  from root dhṛ
  Root: dhṛ (class 1)
• rāṣṭra – kingdom, realm, country, dominion
  noun (neuter)

चिन्तया (cintayā) - due to anxiety (by thought, with anxiety, due to worry)

(noun)

Instrumental, feminine, singular of cintā

cintā - thought, reflection, worry, anxiety, care

action noun

from root cint

Root: cint (class 10)

Note: Indicates the cause or reason.