महाभारतः mahābhārataḥ - book-17, chapter-1, verse-20

विधिवत्कारयित्वेष्टिं नैष्ठिकीं भरतर्षभ ।
समुत्सृज्याप्सु सर्वेऽग्नीन्प्रतस्थुर्नरपुंगवाः ॥२०॥

20. vidhivatkārayitveṣṭiṁ naiṣṭhikīṁ bharatarṣabha ,
samutsṛjyāpsu sarve'gnīnpratasthurnarapuṁgavāḥ.

20. vidhivat kārayitvā iṣṭim naiṣṭhikīm bharatarṣabha
samutsṛjya apsu sarve agnīn pratasthuḥ narapuṃgavāḥ

20. bharatarṣabha narapuṃgavāḥ vidhivat naiṣṭhikīm iṣṭim
kārayitvā sarve agnīn apsu samutsṛjya pratasthuḥ

20. O best of Bharatas, after having the final (Vedic ritual) (iṣṭi) performed according to the rules, and having dissolved all their sacred fires into the waters, those excellent men departed.

Words meanings summery:

• विधिवत् (vidhivat) - In the prescribed ritualistic manner. (according to rule, properly, methodically)

• कारयित्वा (kārayitvā) - Implies they arranged for priests to perform the (Vedic ritual) (iṣṭi). (having caused to be made/done, having had performed)

• इष्टिम् (iṣṭim) - A specific, formal (Vedic ritual) preceding a major life event or renunciation. (Vedic ritual, offering, sacrifice)

• नैष्ठिकीम् (naiṣṭhikīm) - The final (Vedic ritual) performed before embarking on a journey of renunciation. (final, ultimate, concluding, definitive)

• भरतर्षभ (bharatarṣabha) - An address to the listener, likely Dhritarashtra, acknowledging his royal lineage. (O best of Bharatas, O bull among Bharatas)

• समुत्सृज्य (samutsṛjya) - Specifically referring to the ritualistic immersion of sacred fires. (having abandoned, having given up, having cast)

• अप्सु (apsu) - Refers to the sacred act of dissolving the ritual fires into a body of water. (in the waters, into the waters)

• सर्वे (sarve) - Refers to the group of people (Pandavas and Draupadi) who are the implicit subjects of the main verb. (all, everyone)

• अग्नीन् (agnīn) - The consecrated sacrificial fires maintained by householders. (fires, sacred fires)

• प्रतस्थुः (pratasthuḥ) - Their final departure from their kingdom to begin their great journey. (they set out, they departed, they started)

• नरपुंगवाः (narapuṁgavāḥ) - An epithet for the Pandavas, highlighting their heroic qualities. (excellent men, best of men, bulls among men)

Words meanings and morphology

विधिवत् (vidhivat) - In the prescribed ritualistic manner. (according to rule, properly, methodically)

(indeclinable)

From vidhi (rule) + -vat (like, according to).

कारयित्वा (kārayitvā) - Implies they arranged for priests to perform the (Vedic ritual) (iṣṭi). (having caused to be made/done, having had performed)

(indeclinable)

absolutive (gerund) of the causative stem

Causative stem `kāray` + absolutive suffix `itvā`.

Root: kṛ (class 8)

इष्टिम् (iṣṭim) - A specific, formal (Vedic ritual) preceding a major life event or renunciation. (Vedic ritual, offering, sacrifice)

(noun)

Accusative, feminine, singular of iṣṭi

iṣṭi - Vedic ritual, offering, sacrifice, desire

From root `yaj` (to worship, sacrifice).

Root: yaj (class 1)

Note: Object of `kārayitvā`.

नैष्ठिकीम् (naiṣṭhikīm) - The final (Vedic ritual) performed before embarking on a journey of renunciation. (final, ultimate, concluding, definitive)

(adjective)

Accusative, feminine, singular of naiṣṭhika

naiṣṭhika - final, ultimate, conclusive, devoted to one's teacher (as a student)

Derived from niṣṭhā (end, completion).

Note: Adjective for `iṣṭim`.

भरतर्षभ (bharatarṣabha) - An address to the listener, likely Dhritarashtra, acknowledging his royal lineage. (O best of Bharatas, O bull among Bharatas)

(noun)

Vocative, masculine, singular of bharatarṣabha

bharatarṣabha - best of Bharatas, bull among Bharatas

Compound type : tatpuruṣa (bharata+ṛṣabha)

• bharata – descendant of Bharata, an Indian, a warrior
  proper noun (masculine)
• ṛṣabha – bull, best, excellent, leader
  noun (masculine)

समुत्सृज्य (samutsṛjya) - Specifically referring to the ritualistic immersion of sacred fires. (having abandoned, having given up, having cast)

(indeclinable)

absolutive (gerund)

Root `sṛj` with prefixes `sam-` and `ut-` + absolutive suffix `ya`.

Prefixes: sam+ut

Root: sṛj (class 6)

अप्सु (apsu) - Refers to the sacred act of dissolving the ritual fires into a body of water. (in the waters, into the waters)

(noun)

Locative, feminine, plural of ap

ap - water, waters

Always plural in this sense.

सर्वे (sarve) - Refers to the group of people (Pandavas and Draupadi) who are the implicit subjects of the main verb. (all, everyone)

(pronoun)

Nominative, masculine, plural of sarva

sarva - all, every, whole, complete

अग्नीन् (agnīn) - The consecrated sacrificial fires maintained by householders. (fires, sacred fires)

(noun)

Accusative, masculine, plural of agni

agni - fire, god of fire, sacrificial fire

Note: Object of `samutsṛjya`.

प्रतस्थुः (pratasthuḥ) - Their final departure from their kingdom to begin their great journey. (they set out, they departed, they started)

(verb)

3rd person , plural, active, perfect (lit) of √sthā

perfect active 3rd plural

Root `sthā` with prefix `pra-` + perfect ending.

Prefix: pra

Root: sthā (class 1)

नरपुंगवाः (narapuṁgavāḥ) - An epithet for the Pandavas, highlighting their heroic qualities. (excellent men, best of men, bulls among men)

(noun)

Nominative, masculine, plural of narapuṃgava

narapuṁgava - excellent man, best of men, bull among men

Compound type : tatpuruṣa (nara+puṃgava)

• nara – man, human being
  noun (masculine)
• puṃgava – bull, best, excellent, chief
  noun (masculine)

Note: Subject of `pratasthuḥ`.