महाभारतः mahābhārataḥ - book-6, chapter-61, verse-64

यदेतत्परमं गुह्यं त्वत्प्रसादमयं विभो ।
वासुदेव तदेतत्ते मयोद्गीतं यथातथम् ॥६४॥

64. yadetatparamaṁ guhyaṁ tvatprasādamayaṁ vibho ,
vāsudeva tadetatte mayodgītaṁ yathātatham.

64. yat etat paramam guhyam tvat-prasādamayam vibho
vāsudeva tat etat te mayā udgītam yathātatham

64. vibho vāsudeva,
tvat-prasādamayam yat etat paramam guhyam,
tat etat te mayā yathātatham udgītam.

64. O all-pervading Lord (vibho)! O Vāsudeva! This supreme secret (guhyam), which is entirely due to your grace (prasādam), has been sung by me to you exactly as it is.

Words meanings summery:

• यत् (yat) - which, that

• एतत् (etat) - this, this one

• परमम् (paramam) - supreme, highest, most excellent

• गुह्यम् (guhyam) - secret, mysterious, a secret

• त्वत्-प्रसादमयम् (tvat-prasādamayam) - consisting of your grace, full of your grace, embodiment of your grace

• विभो (vibho) - O all-pervading one, O powerful one, O Lord

• वासुदेव (vāsudeva) - O Kṛṣṇa (O Vāsudeva)

• तत् (tat) - that

• एतत् (etat) - this

• ते (te) - to you, for you, your

• मया (mayā) - by me

• उद्गीतम् (udgītam) - sung, chanted

• यथातथम् (yathātatham) - as it is, truly, correctly

Words meanings and morphology

यत् (yat) - which, that

(pronoun)

Nominative, neuter, singular of yad

yad - which, that, what

Note: Refers to 'guhyam'.

एतत् (etat) - this, this one

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one

Note: Refers to 'guhyam'.

परमम् (paramam) - supreme, highest, most excellent

(adjective)

Nominative, neuter, singular of parama

parama - supreme, highest, utmost, excellent

Note: Adjective modifying 'guhyam'.

गुह्यम् (guhyam) - secret, mysterious, a secret

(adjective)

Nominative, neuter, singular of guhya

guhya - secret, hidden, mysterious; a secret

Gerundive

Derived from root guh- (to hide) + -ya suffix

Root: guh (class 1)

Note: Can function as a noun, 'a secret'.

त्वत्-प्रसादमयम् (tvat-prasādamayam) - consisting of your grace, full of your grace, embodiment of your grace

(adjective)

Nominative, neuter, singular of tvat-prasādamaya

tvat-prasādamaya - consisting of your grace, full of your grace

Compound type : tatpurusha (tvat+prasāda+maya)

• tvat – from you, your (ablative singular of yusmad)
  pronoun
• prasāda – grace, favor, clearness, serenity
  noun (masculine)
  Derived from pra-sad (to be clear, to be gracious)
  Prefix: pra
  Root: sad (class 1)
• maya – full of, consisting of, made of, characterised by
  suffix (adjectival)
  Suffix -maya added to nouns to form adjectives

Note: Adjective modifying 'guhyam'.

विभो (vibho) - O all-pervading one, O powerful one, O Lord

(noun)

Vocative, masculine, singular of vibhu

vibhu - all-pervading, powerful, mighty, lord, master

वासुदेव (vāsudeva) - O Kṛṣṇa (O Vāsudeva)

(proper noun)

Vocative, masculine, singular of vāsudeva

vāsudeva - descendant of Vasudeva, son of Vasudeva; Kṛṣṇa

तत् (tat) - that

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Refers back to 'guhyam'.

एतत् (etat) - this

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one

Note: Emphasizes 'this' secret.

ते (te) - to you, for you, your

(pronoun)

Dative, singular of yusmad

yusmad - you (pronoun)

Note: Also genitive, but dative 'to you' fits better with 'sung'.

मया (mayā) - by me

(pronoun)

Instrumental, singular of asmad

asmad - I, we (pronoun)

Note: Agent in passive construction 'udgītam'.

उद्गीतम् (udgītam) - sung, chanted

(adjective)

Nominative, neuter, singular of udgīta

udgīta - sung, chanted

Past Passive Participle

Derived from root gā (to sing) with upasarga ud-

Prefix: ud

Root: gā (class 3)

Note: Functions as the predicate of 'tat etat'.

यथातथम् (yathātatham) - as it is, truly, correctly

(indeclinable)

Compound type : avyayibhāva (yathā+tathā)

• yathā – as, like, according to
  indeclinable
• tathā – so, thus, in that way
  indeclinable

Note: Adverb modifying 'udgītam'.