महाभारतः mahābhārataḥ - book-14, chapter-21, verse-17

गौरिव प्रस्रवत्येषा रसमुत्तमशालिनी ।
सततं स्यन्दते ह्येषा शाश्वतं ब्रह्मवादिनी ॥१७॥

17. gauriva prasravatyeṣā rasamuttamaśālinī ,
satataṁ syandate hyeṣā śāśvataṁ brahmavādinī.

17. gauḥ iva prasravati eṣā rasam uttamaśālinī |
satatam syandate hi eṣā śāśvatam brahmavādinī

17. eṣā uttamaśālinī gauḥ iva rasam prasravati hi
eṣā śāśvatam brahmavādinī satatam syandate

17. This (speech), endowed with supreme excellence, flows forth essence like a cow. Indeed, she constantly streams, articulating the eternal (brahman).

Words meanings summery:

• गौः (gauḥ) - cow (in simile for yielding essence) (cow, earth, speech)

• इव (iva) - like, as, as if

• प्रस्रवति (prasravati) - yields forth (essence) (flows forth, yields, gushes out)

• एषा (eṣā) - this (speech / Vāc) (this (feminine))

• रसम् (rasam) - the supreme essence (of speech) (essence, juice, taste, flavor)

• उत्तमशालिनी (uttamaśālinī) - endowed with supreme excellence, most excellent

• सततम् (satatam) - constantly, perpetually, always

• स्यन्दते (syandate) - flows, streams, drips

• हि (hi) - indeed, for, because

• एषा (eṣā) - this (speech / Vāc) (this (feminine))

• शाश्वतम् (śāśvatam) - the eternal (brahman) (eternal, perpetual, everlasting)

• ब्रह्मवादिनी (brahmavādinī) - speaking of brahman, proclaiming brahman

Words meanings and morphology

गौः (gauḥ) - cow (in simile for yielding essence) (cow, earth, speech)

(noun)

Nominative, feminine, singular of go

go - cow, ox, cattle, earth, ray of light, speech, heaven

इव (iva) - like, as, as if

(indeclinable)

प्रस्रवति (prasravati) - yields forth (essence) (flows forth, yields, gushes out)

(verb)

3rd person , singular, active, present (lat) of √sru

Present Indicative Active

From root √sru (to flow) with prefix pra- (forth, out).

Prefix: pra

Root: √sru (class 1)

एषा (eṣā) - this (speech / Vāc) (this (feminine))

(pronoun)

Nominative, feminine, singular of etas

etas - this

रसम् (rasam) - the supreme essence (of speech) (essence, juice, taste, flavor)

(noun)

Accusative, masculine, singular of rasa

rasa - juice, sap, fluid, essence, taste, aesthetic pleasure

उत्तमशालिनी (uttamaśālinī) - endowed with supreme excellence, most excellent

(adjective)

Nominative, feminine, singular of uttamaśālin

uttamaśālin - possessing supreme excellence

Compound type : tatpuruṣa (uttama+śālin)

• uttama – best, supreme, highest
  adjective
• śālin – possessing, endowed with, eminent, distinguished
  adjective (masculine)

सततम् (satatam) - constantly, perpetually, always

(indeclinable)

Note: Used as an adverb here.

स्यन्दते (syandate) - flows, streams, drips

(verb)

3rd person , singular, middle, present (lat) of √syand

Present Indicative Middle

Root: √syand (class 1)

हि (hi) - indeed, for, because

(indeclinable)

एषा (eṣā) - this (speech / Vāc) (this (feminine))

(pronoun)

Nominative, feminine, singular of etas

etas - this

शाश्वतम् (śāśvatam) - the eternal (brahman) (eternal, perpetual, everlasting)

(adjective)

Accusative, masculine, singular of śāśvata

śāśvata - eternal, perpetual, constant, permanent

Note: Here functioning as an adverb 'eternally' or implicitly modifying 'brahman' as 'the eternal Brahman'.

ब्रह्मवादिनी (brahmavādinī) - speaking of brahman, proclaiming brahman

(adjective)

Nominative, feminine, singular of brahmavādin

brahmavādin - one who speaks of or expounds on brahman

Compound type : tatpuruṣa (brahma+vādin)

• brahman – the Absolute, ultimate reality, sacred word, Veda
  noun (neuter)
• vādin – speaking, declaring, advocating
  adjective (masculine)