योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-116, verse-76

वाचाकोमलया सुकोकिलशिशुः कल्याणकल्पां कथां सर्वावर्जनमार्जवेन कुरुते यावत्पुरो रागिणाम् ।
तावन्मत्तनयोऽयमित्यविरतं द्रांकारभीमारवैर्ध्वांक्षेणोपवने निपत्य नभसः सर्वे कृता नीरसाः ॥ ७६ ॥

vācākomalayā sukokilaśiśuḥ kalyāṇakalpāṃ kathāṃ sarvāvarjanamārjavena kurute yāvatpuro rāgiṇām ,
tāvanmattanayo'yamityavirataṃ drāṃkārabhīmāravairdhvāṃkṣeṇopavane nipatya nabhasaḥ sarve kṛtā nīrasāḥ 76

76. vācā komalayā sukokilaśiśuḥ kalyāṇakalpām kathām
sarvāvarjanamārjavena kurute yāvat puraḥ rāgiṇām tāvat
mattanayaḥ ayam iti aviratam drāṃkārabhīmāravaiḥ
dhvāṃkṣeṇa upavane nipatya nabhasaḥ sarve kṛtāḥ nīrasāḥ

76. yāvat sukokilaśiśuḥ komalayā vācā sarvāvarjanamārjavena
rāgiṇām puraḥ kalyāṇakalpām kathām kurute tāvat
dhvāṃkṣeṇa nabhasaḥ upavane nipatya ayam mattanayaḥ
iti aviratam drāṃkārabhīmāravaiḥ sarve nīrasāḥ kṛtāḥ

76. While a lovely young cuckoo, with its gentle voice and the captivating sincerity that charms all, recounts a delightful tale before those in love, at that very moment, a crow descends from the sky into the garden, crying incessantly with dreadful and terrifying caws, "This one is my son!" and thereby makes everyone utterly joyless.

Words meanings summery:

• वाचा (vācā) - with speech, by means of speech

• कोमलया (komalayā) - with soft, with tender

• सुकोकिलशिशुः (sukokilaśiśuḥ) - a lovely young cuckoo, a good cuckoo chick

• कल्याणकल्पाम् (kalyāṇakalpām) - a nearly auspicious, a delightful, a promising

• कथाम् (kathām) - a tale, a story

• सर्वावर्जनमार्जवेन (sarvāvarjanamārjavena) - with honesty/straightforwardness that attracts everyone

• कुरुते (kurute) - performs, makes, does

• यावत् (yāvat) - as long as, while

• पुरः (puraḥ) - in front of, before

• रागिणाम् (rāgiṇām) - of the enamored ones, of lovers

• तावत् (tāvat) - then, at that moment

• मत्तनयः (mattanayaḥ) - my son, my own son

• अयम् (ayam) - this (one)

• इति (iti) - thus, so saying

• अविरतम् (aviratam) - incessantly, continuously, without interruption

• द्रांकारभीमारवैः (drāṁkārabhīmāravaiḥ) - with dreadful cawing and terrifying cries

• ध्वांक्षेण (dhvāṁkṣeṇa) - by a crow

• उपवने (upavane) - in the garden, in the grove

• निपत्य (nipatya) - having descended, having fallen

• नभसः (nabhasaḥ) - from the sky, from the atmosphere

• सर्वे (sarve) - all (of them)

• कृताः (kṛtāḥ) - made, done

• नीरसाः (nīrasāḥ) - joyless, tasteless, dull, devoid of charm

Words meanings and morphology

वाचा (vācā) - with speech, by means of speech

(noun)

Instrumental, feminine, singular of vāc

vāc - speech, voice, word

कोमलया (komalayā) - with soft, with tender

(adjective)

Instrumental, feminine, singular of komala

komala - soft, tender, gentle, delicate

सुकोकिलशिशुः (sukokilaśiśuḥ) - a lovely young cuckoo, a good cuckoo chick

(noun)

Nominative, masculine, singular of sukokilaśiśu

sukokilaśiśu - a lovely young cuckoo, a good cuckoo chick

Compound type : tatpurusha (su+kokila+śiśu)

• su – good, well, beautiful
  indeclinable
• kokila – a cuckoo
  noun (masculine)
• śiśu – a child, a young one, an infant
  noun (masculine)

Note: Subject of kurute

कल्याणकल्पाम् (kalyāṇakalpām) - a nearly auspicious, a delightful, a promising

(adjective)

Accusative, feminine, singular of kalyāṇakalpa

kalyāṇakalpa - nearly auspicious, delightful, promising well-being

from kalyāṇa + kalpa (suffix indicating 'nearly' or 'resembling')

Compound type : tatpurusha (kalyāṇa+kalpa)

• kalyāṇa – auspicious, fortunate, good, beautiful
  adjective
• kalpa – resembling, nearly, almost
  adjective
  suffix meaning 'like', 'similar to'

कथाम् (kathām) - a tale, a story

(noun)

Accusative, feminine, singular of kathā

kathā - a tale, a story, a narrative

Note: Object of kurute

सर्वावर्जनमार्जवेन (sarvāvarjanamārjavena) - with honesty/straightforwardness that attracts everyone

(noun)

Instrumental, neuter, singular of sarvāvarjanamārjava

sarvāvarjanamārjava - honesty/straightforwardness that attracts everyone, charm that wins all over

Compound type : tatpurusha (sarva+āvarjana+ārjava)

• sarva – all, every
  pronoun
• āvarjana – attracting, captivating, winning over
  noun (neuter)
  from ā-vṛj
  Prefix: ā
  Root: vṛj (class 1)
• ārjava – straightforwardness, honesty, sincerity
  noun (neuter)

कुरुते (kurute) - performs, makes, does

(verb)

3rd person , singular, middle, present (laṭ) of kṛ

Present Tense, Middle Voice

Root: kṛ (class 8)

यावत् (yāvat) - as long as, while

(indeclinable)

Note: Marks the first clause of a temporal correlation.

पुरः (puraḥ) - in front of, before

(indeclinable)

रागिणाम् (rāgiṇām) - of the enamored ones, of lovers

(adjective)

Genitive, masculine, plural of rāgin

rāgin - enamored, passionate, loving, colored

तावत् (tāvat) - then, at that moment

(indeclinable)

Note: Marks the second clause of a temporal correlation.

मत्तनयः (mattanayaḥ) - my son, my own son

(noun)

Nominative, masculine, singular of mattanaya

mattanaya - my son

Compound type : tatpurusha (mat+tanaya)

• mat – my, of me (variant of mama)
  pronoun
  Genitive form of asmad
• tanaya – son
  noun (masculine)

Note: Part of the direct speech attributed to the crow.

अयम् (ayam) - this (one)

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Note: Agrees with mattanayaḥ

इति (iti) - thus, so saying

(indeclinable)

Note: Marks direct speech

अविरतम् (aviratam) - incessantly, continuously, without interruption

(indeclinable)

Past Passive Participle

from a-vi-ram + kta

Prefixes: a+vi

Root: ram (class 1)

Note: Adverbial usage.

द्रांकारभीमारवैः (drāṁkārabhīmāravaiḥ) - with dreadful cawing and terrifying cries

(noun)

Instrumental, masculine, plural of drāṃkārabhīmārava

drāṁkārabhīmārava - dreadful cawing and terrifying cries

Compound type : tatpurusha (drāṃkāra+bhīma+rava)

• drāṃkāra – the cry of a crow, cawing
  noun (masculine)
• bhīma – dreadful, terrifying, terrible
  adjective
• rava – sound, cry, noise
  noun (masculine)

Note: Modifies the crow's action.

ध्वांक्षेण (dhvāṁkṣeṇa) - by a crow

(noun)

Instrumental, masculine, singular of dhvāṃkṣa

dhvāṁkṣa - a crow

Note: Agent of the action कृताः (made).

उपवने (upavane) - in the garden, in the grove

(noun)

Locative, neuter, singular of upavana

upavana - a grove, a garden, a small forest near a town

Note: Place where the action occurs.

निपत्य (nipatya) - having descended, having fallen

(indeclinable)

Absolutive/Gerund

from ni-pat + lyap (suffix)

Prefix: ni

Root: pat (class 1)

नभसः (nabhasaḥ) - from the sky, from the atmosphere

(noun)

Ablative, neuter, singular of nabhas

nabhas - sky, atmosphere, heaven

Note: Source of descent (nipatya).

सर्वे (sarve) - all (of them)

(pronoun)

Nominative, masculine, plural of sarva

sarva - all, every, entire

Note: Subject (of the passive verb kṛtāḥ), referring to the onlookers/listeners.

कृताः (kṛtāḥ) - made, done

(adjective)

Nominative, masculine, plural of kṛta

kṛta - made, done, performed

Past Passive Participle

from kṛ + kta (suffix)

Root: kṛ (class 8)

Note: Used as part of the predicate "rendered joyless."

नीरसाः (nīrasāḥ) - joyless, tasteless, dull, devoid of charm

(adjective)

Nominative, masculine, plural of nīrasa

nīrasa - tasteless, insipid, joyless, dull, devoid of charm

from ni + rasa

Compound type : bahuvrihi (nis+rasa)

• nis – without, free from (prefix)
  indeclinable
• rasa – juice, taste, essence, emotion, charm
  noun (masculine)

Note: Predicate adjective.