महाभारतः mahābhārataḥ - book-12, chapter-328, verse-45

ततो वै तमृषिश्रेष्ठं मैथुनोपगतं तथा ।
उवाच गर्भः कौन्तेय पञ्चभूतसमन्वितः ॥४५॥

45. tato vai tamṛṣiśreṣṭhaṁ maithunopagataṁ tathā ,
uvāca garbhaḥ kaunteya pañcabhūtasamanvitaḥ.

45. tataḥ vai tam ṛṣiśreṣṭham maithunopagatam tathā
uvāca garbhaḥ kaunteya pañcabhūtasamanvitaḥ

45. kaunteya tataḥ vai pañcabhūtasamanvitaḥ garbhaḥ
maithunopagatam tam ṛṣiśreṣṭham tathā uvāca

45. O Kaunteya, then indeed, the fetus, endowed with the five elements, spoke to that best of sages who was engaged in sexual union.

Words meanings summery:

• ततः (tataḥ) - then (referring to time) (then, from that, therefore)

• वै (vai) - indeed, certainly

• तम् (tam) - that (sage) (him, that (masculine singular))

• ऋषिश्रेष्ठम् (ṛṣiśreṣṭham) - the best of sages (Bṛhaspati) (the best of sages)

• मैथुनोपगतम् (maithunopagatam) - engaged in sexual union (referring to Bṛhaspati) (engaged in sexual intercourse, having approached sexual union)

• तथा (tathā) - thus, so, in that manner

• उवाच (uvāca) - the fetus spoke (he spoke, he said)

• गर्भः (garbhaḥ) - the unborn child (the fetus) (fetus, embryo, womb)

• कौन्तेय (kaunteya) - O Kaunteya (addressing Arjuna) (O son of Kuntī)

• पञ्चभूतसमन्वितः (pañcabhūtasamanvitaḥ) - composed of the five fundamental elements (earth, water, fire, air, ether) (endowed with the five elements, composed of the five elements)

Words meanings and morphology

ततः (tataḥ) - then (referring to time) (then, from that, therefore)

(indeclinable)

वै (vai) - indeed, certainly

(indeclinable)

तम् (tam) - that (sage) (him, that (masculine singular))

(pronoun)

Accusative, masculine, singular of tad

tad - that, him, it (demonstrative pronoun)

ऋषिश्रेष्ठम् (ṛṣiśreṣṭham) - the best of sages (Bṛhaspati) (the best of sages)

(noun)

Accusative, masculine, singular of ṛṣiśreṣṭha

ṛṣiśreṣṭha - best of sages, eminent sage

मैथुनोपगतम् (maithunopagatam) - engaged in sexual union (referring to Bṛhaspati) (engaged in sexual intercourse, having approached sexual union)

(adjective)

Accusative, masculine, singular of maithunopagata

maithunopagata - engaged in sexual intercourse, having approached sexual union

Compound type : tatpuruṣa (maithuna+upagata)

• maithuna – sexual union, copulation, conjugal act
  noun (neuter)
• upagata – approached, gone to, obtained
  adjective
  Past Passive Participle
  Derived from the root √gam (to go) with the prefix upa-.
  Prefix: upa
  Root: gam (class 1)

तथा (tathā) - thus, so, in that manner

(indeclinable)

उवाच (uvāca) - the fetus spoke (he spoke, he said)

(verb)

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

Root: vac (class 2)

गर्भः (garbhaḥ) - the unborn child (the fetus) (fetus, embryo, womb)

(noun)

Nominative, masculine, singular of garbha

garbha - fetus, embryo, womb, interior

कौन्तेय (kaunteya) - O Kaunteya (addressing Arjuna) (O son of Kuntī)

(proper noun)

Vocative, masculine, singular of kaunteya

kaunteya - son of Kuntī (an epithet, typically for Arjuna or other Pāṇḍavas)

पञ्चभूतसमन्वितः (pañcabhūtasamanvitaḥ) - composed of the five fundamental elements (earth, water, fire, air, ether) (endowed with the five elements, composed of the five elements)

(adjective)

Nominative, masculine, singular of pañcabhūtasamanvita

pañcabhūtasamanvita - endowed with the five elements (earth, water, fire, air, ether)

Compound type : tatpuruṣa (pañcan+bhūta+samanvita)

• pañcan – five
  numeral
• bhūta – element, being, creature
  noun (neuter)
• samanvita – endowed with, accompanied by, possessed of
  adjective
  Past Passive Participle
  Derived from the root √i (to go) with prefixes sam- and anu-.
  Prefixes: sam+anu
  Root: i (class 2)