महाभारतः mahābhārataḥ - book-9, chapter-48, verse-21

तत्र हत्वा पुरा विष्णुरसुरौ मधुकैटभौ ।
आप्लुतो भरतश्रेष्ठ तीर्थप्रवर उत्तमे ॥२१॥

21. tatra hatvā purā viṣṇurasurau madhukaiṭabhau ,
āpluto bharataśreṣṭha tīrthapravara uttame.

21. tatra hatvā purā viṣṇuḥ asurau madhukaiṭabhau
āplutaḥ bharataśreṣṭha tīrthapravara uttame

21. bharataśreṣṭha,
purā tatra viṣṇuḥ madhukaiṭabhau asurau hatvā,
tīrthapravara uttame (tīrthe) āplutaḥ

21. O best among the Bhāratas (bharataśreṣṭha), Viṣṇu, having formerly slain the two demons Madhu and Kaiṭabha there, bathed in that preeminent and supreme ford (tīrtha).

Words meanings summery:

• तत्र (tatra) - there, in that place

• हत्वा (hatvā) - having killed, after killing

• पुरा (purā) - formerly, in ancient times

• विष्णुः (viṣṇuḥ) - Viṣṇu

• असुरौ (asurau) - two demons

• मधुकैटभौ (madhukaiṭabhau) - The two demons slain by Viṣṇu (Madhu and Kaiṭabha)

• आप्लुतः (āplutaḥ) - bathed, immersed

• भरतश्रेष्ठ (bharataśreṣṭha) - O best of Bharatas

• तीर्थप्रवर (tīrthapravara) - best of fords, excellent sacred place

• उत्तमे (uttame) - in the supreme, in the excellent

Words meanings and morphology

तत्र (tatra) - there, in that place

(indeclinable)

हत्वा (hatvā) - having killed, after killing

(indeclinable)

Absolutive/Gerund

Derived from √han 'to strike, kill'

Root: √han (class 2)

पुरा (purā) - formerly, in ancient times

(indeclinable)

विष्णुः (viṣṇuḥ) - Viṣṇu

(proper noun)

Nominative, masculine, singular of viṣṇu

viṣṇu - a name of the Hindu deity Viṣṇu

असुरौ (asurau) - two demons

(noun)

Accusative, masculine, dual of asura

asura - a demon, an anti-god

मधुकैटभौ (madhukaiṭabhau) - The two demons slain by Viṣṇu (Madhu and Kaiṭabha)

(proper noun)

Accusative, masculine, dual of madhukaiṭabha

madhukaiṭabha - Madhu and Kaiṭabha (names of two demons)

Compound type : dvandva (madhu+kaiṭabha)

• madhu – honey; a demon
  noun (masculine)
• kaiṭabha – a demon, a name of one of the two demons Madhu and Kaiṭabha
  noun (masculine)

आप्लुतः (āplutaḥ) - bathed, immersed

(adjective)

Nominative, masculine, singular of āpluta

āpluta - bathed, immersed, drenched

Past Passive Participle

Derived from √plu 'to float, swim, bathe' with prefix ā-

Prefix: ā

Root: √plu (class 1)

Note: Used actively here.

भरतश्रेष्ठ (bharataśreṣṭha) - O best of Bharatas

(noun)

Vocative, masculine, singular of bharataśreṣṭha

bharataśreṣṭha - best of Bharatas; an epithet used for Pandavas and Kauravas

Compound type : tatpuruṣa (bharata+śreṣṭha)

• bharata – a descendant of Bharata, a name of various kings
  noun (masculine)
• śreṣṭha – best, excellent, most excellent
  adjective (masculine)

तीर्थप्रवर (tīrthapravara) - best of fords, excellent sacred place

(noun)

Nominative, masculine, singular of tīrthapravara

tīrthapravara - the best of fords, excellent sacred place

Compound type : tatpuruṣa (tīrtha+pravara)

• tīrtha – ford, bathing place, sacred place (tīrtha)
  noun (neuter)
  Root: √tṝ (class 1)
• pravara – best, excellent, chief
  adjective (masculine)
  Prefix: pra

Note: Grammatically nominative singular masculine. Contextually, it refers to the sacred place, which is implicitly in locative, consistent with 'uttame'.

उत्तमे (uttame) - in the supreme, in the excellent

(adjective)

Locative, neuter, singular of uttama

uttama - highest, supreme, best, excellent