महाभारतः mahābhārataḥ - book-12, chapter-335, verse-54

स्थापयित्वा हयशिर उदक्पूर्वे महोदधौ ।
वेदानामालयश्चापि बभूवाश्वशिरास्ततः ॥५४॥

54. sthāpayitvā hayaśira udakpūrve mahodadhau ,
vedānāmālayaścāpi babhūvāśvaśirāstataḥ.

54. sthāpayitvā hayaśiraḥ udakpūrve mahodadhau |
vedānām ālayaḥ ca api babhūva aśvaśirāḥ tataḥ

54. tataḥ udakpūrve mahodadhau hayaśiraḥ sthāpayitvā,
vedānām ālayaḥ ca api aśvaśirāḥ babhūva.

54. Having established the horse-head (form of the deity) in the north-eastern part of the great ocean, the horse-headed one (Hayagrīva) then became the repository of the Vedas as well.

Words meanings summery:

• स्थापयित्वा (sthāpayitvā) - having placed, having established

• हयशिरः (hayaśiraḥ) - referring to the deity Hayagrīva (horse-head, the horse-headed one)

• उदक्पूर्वे (udakpūrve) - in the north-eastern direction/quarter (in the north-eastern)

• महोदधौ (mahodadhau) - in the great ocean

• वेदानाम् (vedānām) - of the Vedas

• आलयः (ālayaḥ) - repository, protector (abode, dwelling, repository, house)

• च (ca) - also (and, also)

• अपि (api) - also (also, even, too)

• बभूव (babhūva) - became, happened, was

• अश्वशिराः (aśvaśirāḥ) - referring to the deity Hayagrīva (horse-headed, the horse-headed one)

• ततः (tataḥ) - then, from that point (then, from that, thereafter)

Words meanings and morphology

स्थापयित्वा (sthāpayitvā) - having placed, having established

(indeclinable)

Absolutive (Gerund)

Derived from causative root sthā (to stand) + ktvā (absolutive suffix)

Root: sthā (class 1)

हयशिरः (hayaśiraḥ) - referring to the deity Hayagrīva (horse-head, the horse-headed one)

(noun)

Accusative, neuter, singular of hayaśiras

hayaśiras - horse-head, the horse-headed

Compound of Haya (horse) and Śiras (head)

Compound type : tatpurusha (haya+śiras)

• haya – horse
  noun (masculine)
• śiras – head
  noun (neuter)

Note: The word "hayaśiras" is typically neuter. Here it functions as the object of "sthāpayitvā".

उदक्पूर्वे (udakpūrve) - in the north-eastern direction/quarter (in the north-eastern)

(adjective)

Locative, singular of udakpūrva

udakpūrva - north-eastern

Compound of udak (north) and pūrva (east)

Compound type : tatpurusha (udak+pūrva)

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

Note: Modifies mahodadhau.

महोदधौ (mahodadhau) - in the great ocean

(noun)

Locative, masculine, singular of mahodadhi

mahodadhi - great ocean

Compound of mahā (great) and udadhi (ocean)

Compound type : karmadhāraya (mahā+udadhi)

• mahā – great, large
  adjective
• udadhi – ocean, sea
  noun (masculine)

वेदानाम् (vedānām) - of the Vedas

(noun)

Genitive, masculine, plural of veda

veda - knowledge, sacred knowledge, Veda

Derived from root vid (to know)

Root: vid (class 2)

आलयः (ālayaḥ) - repository, protector (abode, dwelling, repository, house)

(noun)

Nominative, masculine, singular of ālaya

ālaya - abode, dwelling, repository, house, receptacle

From ā + √lī (to cling to, to dissolve)

Prefix: ā

Root: lī (class 4)

Note: Subject of 'babhūva'.

च (ca) - also (and, also)

(indeclinable)

अपि (api) - also (also, even, too)

(indeclinable)

बभूव (babhūva) - became, happened, was

(verb)

3rd person , singular, active, perfect (lit) of bhū

Perfect Active

3rd person singular Perfect Active of √bhū

Root: bhū (class 1)

अश्वशिराः (aśvaśirāḥ) - referring to the deity Hayagrīva (horse-headed, the horse-headed one)

(noun)

Nominative, masculine, singular of aśvaśiras

aśvaśiras - horse-head, horse-headed

Compound of aśva (horse) and śiras (head)

Compound type : bahuvrihi (aśva+śiras)

• aśva – horse
  noun (masculine)
• śiras – head
  noun (neuter)

Note: Predicate nominative to 'ālayaḥ' and 'babhūva'.

ततः (tataḥ) - then, from that point (then, from that, thereafter)

(indeclinable)

Ablative form used as an adverb.