महाभारतः mahābhārataḥ - book-15, chapter-37, verse-18

ततः कुन्ती श्वशुरयोः प्रणम्य शिरसा तदा ।
उवाच वाक्यं सव्रीडं विवृण्वाना पुरातनम् ॥१८॥

18. tataḥ kuntī śvaśurayoḥ praṇamya śirasā tadā ,
uvāca vākyaṁ savrīḍaṁ vivṛṇvānā purātanam.

18. tataḥ kuntī śvaśurayoḥ praṇamya śirasā tadā
uvāca vākyaṃ savrīḍam vivṛṇvānā purātanam

18. tataḥ tadā kuntī śvaśurayoḥ śirasā praṇamya
savrīḍam purātanam vākyaṃ vivṛṇvānā uvāca

18. Then Kunti, at that moment, having bowed her head to her parents-in-law, spoke a statement with modesty, revealing an old secret.

Words meanings summery:

• ततः (tataḥ) - then, thereafter

• कुन्ती (kuntī) - Kunti

• श्वशुरयोः (śvaśurayoḥ) - of the parents-in-law, to the parents-in-law

• प्रणम्य (praṇamya) - having bowed, after bowing

• शिरसा (śirasā) - with the head

• तदा (tadā) - then, at that time

• उवाच (uvāca) - spoke, said

• वाक्यम् (vākyam) - a statement, a word, a speech

• सव्रीडम् (savrīḍam) - with modesty, with shame, bashfully

• विवृण्वाना (vivṛṇvānā) - revealing, disclosing, unfolding

• पुरातनम् (purātanam) - ancient, old, traditional

Words meanings and morphology

ततः (tataḥ) - then, thereafter

(indeclinable)

from pronominal base tad

कुन्ती (kuntī) - Kunti

(proper noun)

Nominative, feminine, singular of kuntī

kuntī - name of a queen, mother of the Pandavas

श्वशुरयोः (śvaśurayoḥ) - of the parents-in-law, to the parents-in-law

(noun)

Genitive, masculine, dual of śvaśura

śvaśura - father-in-law, male in-law

Note: Dual form refers to both parents-in-law (father-in-law and mother-in-law).

प्रणम्य (praṇamya) - having bowed, after bowing

(indeclinable)

Absolutive

from root nam (to bow) with prefix pra

Prefix: pra

Root: nam (class 1)

शिरसा (śirasā) - with the head

(noun)

Instrumental, neuter, singular of śiras

śiras - head, top

तदा (tadā) - then, at that time

(indeclinable)

from pronominal base tad

उवाच (uvāca) - spoke, said

(verb)

3rd person , singular, active, Perfect (Lit) of vac

Perfect Active

3rd person singular, Perfect tense (Lit), active voice

Root: vac (class 2)

वाक्यम् (vākyam) - a statement, a word, a speech

(noun)

Accusative, neuter, singular of vākya

vākya - speech, word, statement, sentence

सव्रीडम् (savrīḍam) - with modesty, with shame, bashfully

(adjective)

Accusative, neuter, singular of savrīḍa

savrīḍa - bashful, modest, ashamed

bahuvrīhi compound with sa (with) and vrīḍā (shame)

Compound type : bahuvrihi (sa+vrīḍā)

• sa – with, together with
  indeclinable
• vrīḍā – shame, modesty, embarrassment
  noun (feminine)

Note: Agrees with vākyam.

विवृण्वाना (vivṛṇvānā) - revealing, disclosing, unfolding

(participle)

Nominative, feminine, singular of vivṛṇvāna

vivṛṇvāna - revealing, disclosing, making manifest

Present Active Participle (Ātmanepada)

from root vṛ (to cover) with prefix vi (away, apart) meaning to uncover/reveal; ātmanepada form

Prefix: vi

Root: vṛ (class 5)

Note: Agrees with Kunti.

पुरातनम् (purātanam) - ancient, old, traditional

(adjective)

Accusative, neuter, singular of purātana

purātana - ancient, old, former, traditional

Note: Agrees with vākyam (an implied 'secret' or 'story').