महाभारतः mahābhārataḥ - book-12, chapter-335, verse-27

अथ तौ दानवश्रेष्ठौ वेदान्गृह्य सनातनान् ।
रसां विविशतुस्तूर्णमुदक्पूर्वे महोदधौ ॥२७॥

27. atha tau dānavaśreṣṭhau vedāngṛhya sanātanān ,
rasāṁ viviśatustūrṇamudakpūrve mahodadhau.

27. atha tau dānavaśreṣṭhau vedān gṛhya sanātanān
rasām viviśatuḥ tūrṇam udakpūrve mahodadhau

27. atha tau dānavaśreṣṭhau sanātanān vedān gṛhya
tūrṇam udakpūrve mahodadhau rasām viviśatuḥ

27. Then, those two chief dānavas, having seized the eternal (Vedas), quickly entered the netherworld (Rasā) in the north-eastern great ocean.

Words meanings summery:

• अथ (atha) - now, then, thereupon

• तौ (tau) - those two

• दानवश्रेष्ठौ (dānavaśreṣṭhau) - the two chief dānavas (Madhu and Kaiṭabha) (the best of dānavas, chief dānavas)

• वेदान् (vedān) - the (Vedas), sacred knowledge

• गृह्य (gṛhya) - having taken, having seized

• सनातनान् (sanātanān) - the eternal (Vedas) (eternal, perpetual, ancient)

• रसाम् (rasām) - the netherworld (Rasā), a subterranean region (the netherworld, the earth, juice, taste, essence)

• विविशतुः (viviśatuḥ) - they entered

• तूर्णम् (tūrṇam) - quickly, swiftly

• उदक्पूर्वे (udakpūrve) - in the north-eastern region of the ocean (in the north-eastern part)

• महोदधौ (mahodadhau) - in the great ocean

Words meanings and morphology

अथ (atha) - now, then, thereupon

(indeclinable)

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, those

दानवश्रेष्ठौ (dānavaśreṣṭhau) - the two chief dānavas (Madhu and Kaiṭabha) (the best of dānavas, chief dānavas)

(noun)

Nominative, masculine, dual of dānavaśreṣṭha

dānavaśreṣṭha - best of dānavas, chief dānava

Compound of 'dānava' and 'śreṣṭha'

Compound type : tatpurusha (dānava+śreṣṭha)

• dānava – descendant of Danu, a type of asura/demon
  noun (masculine)
• śreṣṭha – best, most excellent, chief
  adjective
  Superlative of 'praśasya' (praiseworthy)

वेदान् (vedān) - the (Vedas), sacred knowledge

(noun)

Accusative, masculine, plural of veda

veda - sacred knowledge, (Veda), understanding, knowledge

From root 'vid' (to know)

Root: vid (class 2)

गृह्य (gṛhya) - having taken, having seized

(indeclinable)

absolutive (gerund)

Formed from root 'grah' + suffix '-ya' (often used after prefixes, but here as a simple absolutive form)

Root: grah (class 9)

सनातनान् (sanātanān) - the eternal (Vedas) (eternal, perpetual, ancient)

(adjective)

Accusative, masculine, plural of sanātana

sanātana - eternal, perpetual, ancient, everlasting, primeval

Derived from 'sanā' (always) + 'tana' (suffix indicating time)

रसाम् (rasām) - the netherworld (Rasā), a subterranean region (the netherworld, the earth, juice, taste, essence)

(noun)

Accusative, feminine, singular of rasā

rasā - netherworld, the earth, juice, taste, essence, a mythical river

विविशतुः (viviśatuḥ) - they entered

(verb)

3rd person , dual, active, past perfect (lit) of viś

perfect tense, 3rd dual active

Root 'viś', perfect form

Root: viś (class 6)

तूर्णम् (tūrṇam) - quickly, swiftly

(indeclinable)

Past Passive Participle of 'tvar' used as adverb

From root 'tvar' (to hasten, be quick)

Root: tvar (class 1)

उदक्पूर्वे (udakpūrve) - in the north-eastern region of the ocean (in the north-eastern part)

(adjective)

Locative, masculine, singular of udakpūrva

udakpūrva - north-eastern

Compound of 'udak' (north) and 'pūrva' (east)

Compound type : tatpurusha (udak+pūrva)

• udak – north, northern
  indeclinable
• pūrva – east, eastern, former, prior
  adjective

महोदधौ (mahodadhau) - in the great ocean

(noun)

Locative, masculine, singular of mahodadhi

mahodadhi - great ocean, sea, large body of water

Compound of 'mahā' (great) and 'udadhi' (ocean)

Compound type : karmadhāraya (mahā+udadhi)

• mahā – great, large, mighty, powerful
  adjective
• udadhi – ocean, sea, receptacle of water
  noun (masculine)
  From 'uda' (water) + 'dhi' (holder)