महाभारतः mahābhārataḥ - book-12, chapter-122, verse-4

तदाप्रभृति राजेन्द्र ऋषिभिः संशितव्रतैः ।
मुञ्जपृष्ठ इति प्रोक्तः स देशो रुद्रसेवितः ॥४॥

4. tadāprabhṛti rājendra ṛṣibhiḥ saṁśitavrataiḥ ,
muñjapṛṣṭha iti proktaḥ sa deśo rudrasevitaḥ.

4. tadāprabhṛti rājendra ṛṣibhiḥ saṃśitavrataiḥ
muñjapṛṣṭhaḥ iti proktaḥ saḥ deśaḥ rudrasevitaḥ

4. rājendra tadāprabhṛti saṃśitavrataiḥ ṛṣibhiḥ
rudrasevitaḥ saḥ deśaḥ muñjapṛṣṭhaḥ iti proktaḥ

4. O King of kings, from that time onwards, that region, served by Rudra, was thus called Munjapṛṣṭha by the sages who observed firm vows.

Words meanings summery:

• तदाप्रभृति (tadāprabhṛti) - from then onwards, from that time

• राजेन्द्र (rājendra) - addressed to Yudhiṣṭhira, to whom Bhishma is speaking (O King of kings, O best of kings)

• ऋषिभिः (ṛṣibhiḥ) - by the sages

• संशितव्रतैः (saṁśitavrataiḥ) - by those of sharpened/firm vows

• मुञ्जपृष्ठः (muñjapṛṣṭhaḥ) - the name given to the region (Munjapṛṣṭha (as a name))

• इति (iti) - indicates that 'Munjapṛṣṭha' is the name given (thus, as (introducing a name or designation))

• प्रोक्तः (proktaḥ) - called, named, declared

• सः (saḥ) - that region (that (masculine nominative singular))

• देशः (deśaḥ) - region, country, place

• रुद्रसेवितः (rudrasevitaḥ) - served by Rudra, inhabited by Rudra

Words meanings and morphology

तदाप्रभृति (tadāprabhṛti) - from then onwards, from that time

(indeclinable)

Compound of tadā (then) and prabhṛti (from, since).

राजेन्द्र (rājendra) - addressed to Yudhiṣṭhira, to whom Bhishma is speaking (O King of kings, O best of kings)

(noun)

Vocative, masculine, singular of rājendra

rājendra - king of kings, best of kings, supreme ruler

Compound of rājan (king) and indra (chief, best). Vocative singular.

ऋषिभिः (ṛṣibhiḥ) - by the sages

(noun)

Instrumental, masculine, plural of ṛṣi

ṛṣi - sage, seer, inspired poet

Note: Indicates the agents of the action 'proktaḥ'.

संशितव्रतैः (saṁśitavrataiḥ) - by those of sharpened/firm vows

(adjective)

Instrumental, masculine, plural of saṃśitavrata

saṁśitavrata - of firm/sharpened vows, whose vows are keen, rigid in vows

Compound: saṃśita (sharpened, firm) + vrata (vow).

Compound type : bahuvrīhi (samśita+vrata)

• samśita – sharpened, firm, severe, strict
  adjective
  Past Passive Participle
  From root śo/śi (to sharpen) with prefix sam-
  Prefix: sam
  Root: śo (class 4)
• vrata – vow, sacred observance, religious practice, rule
  noun (neuter)

Note: Agrees with ṛṣibhiḥ.

मुञ्जपृष्ठः (muñjapṛṣṭhaḥ) - the name given to the region (Munjapṛṣṭha (as a name))

(proper noun)

Nominative, neuter, singular of muñjapṛṣṭha

muñjapṛṣṭha - Munjapṛṣṭha (name of a mountain peak or region)

Compound type : tatpuruṣa (muñja+pṛṣṭha)

• muñja – a kind of grass (Saccharum Munja)
  noun (masculine)
• pṛṣṭha – back, surface, top, peak, ridge
  noun (neuter)

इति (iti) - indicates that 'Munjapṛṣṭha' is the name given (thus, as (introducing a name or designation))

(indeclinable)

प्रोक्तः (proktaḥ) - called, named, declared

(adjective)

Nominative, masculine, singular of prokta

prokta - said, spoken, declared, named

Past Passive Participle

From root vac (to speak) with prefix pra-

Prefix: pra

Root: vac (class 2)

Note: Agrees with deśaḥ.

सः (saḥ) - that region (that (masculine nominative singular))

(pronoun)

Nominative, masculine, singular of tad

tad - that, that one, he, it

Note: Refers to the region mentioned.

देशः (deśaḥ) - region, country, place

(noun)

Nominative, masculine, singular of deśa

deśa - region, country, place, spot

Note: Subject of proktaḥ.

रुद्रसेवितः (rudrasevitaḥ) - served by Rudra, inhabited by Rudra

(adjective)

Nominative, masculine, singular of rudrasevita

rudrasevita - served/attended by Rudra, frequented by Rudra, honored by Rudra

Compound: Rudra (name of a deity) + sevita (served/attended).

Compound type : tatpuruṣa (rudra+sevita)

• rudra – Rudra (Vedic deity, later associated with Shiva)
  proper noun (masculine)
• sevita – served, attended, frequented, worshipped
  adjective
  Past Passive Participle
  From root sev (to serve)
  Root: sev (class 1)

Note: Agrees with deśaḥ.