योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-70, verse-3

आकाशत्वाद्यदाद्योऽयं पराकाशो भवाम्यहम् ।
तदा महाप्रलयता वासनायाश्च संक्षयः ॥ ३ ॥

ākāśatvādyadādyo'yaṃ parākāśo bhavāmyaham ,
tadā mahāpralayatā vāsanāyāśca saṃkṣayaḥ 3

3. ākāśatvāt yadā ādyaḥ ayam parākāśaḥ bhavāmi aham
| tadā mahāpralaytā vāsanāyāḥ ca saṃkṣayaḥ ||

3. yadā ākāśatvāt aham ayam ādyaḥ parākāśaḥ bhavāmi
tadā mahāpralaytā ca vāsanāyāḥ saṃkṣayaḥ [bhavati]

3. When, by virtue of the nature of space, I become this primeval supreme space (parākāśa), then (there occurs) the great dissolution (mahāpralaya) and the complete annihilation of latent impressions (vāsanā).

Words meanings summery:

• आकाशत्वात् (ākāśatvāt) - from the nature of space, due to being space

• यदा (yadā) - when

• आद्यः (ādyaḥ) - first, primeval, original

• अयम् (ayam) - this (masculine)

• पराकाशः (parākāśaḥ) - supreme space, ultimate space

• भवामि (bhavāmi) - I become, I am

• अहम् (aham) - I

• तदा (tadā) - then, at that time

• महाप्रलय्ता (mahāpralaytā) - the state of great dissolution

• वासनायाः (vāsanāyāḥ) - of latent impressions, of desires

• च (ca) - and

• संक्षयः (saṁkṣayaḥ) - complete destruction, annihilation, perishing

Words meanings and morphology

आकाशत्वात् (ākāśatvāt) - from the nature of space, due to being space

(noun)

Ablative, neuter, singular of ākāśatva

ākāśatva - the state or quality of being space/ether

Compound type : Tatpurusha (ākāśa+tva)

• ākāśa – space, ether, sky
  noun (masculine)
• tva – -ness, -hood (suffix forming abstract nouns)
  noun (neuter)

यदा (yadā) - when

(indeclinable)

आद्यः (ādyaḥ) - first, primeval, original

(adjective)

Nominative, masculine, singular of ādya

ādya - first, primeval, original, earliest

अयम् (ayam) - this (masculine)

(pronoun)

Nominative, masculine, singular of idam

idam - this

पराकाशः (parākāśaḥ) - supreme space, ultimate space

(noun)

Nominative, masculine, singular of parākāśa

parākāśa - supreme space, ultimate ether

Compound type : Tatpurusha (para+ākāśa)

• para – supreme, ultimate, highest, other
  adjective (masculine)
• ākāśa – space, ether, sky
  noun (masculine)

भवामि (bhavāmi) - I become, I am

(verb)

1st person , singular, active, present (laṭ) of bhū

Root: bhū (class 1)

अहम् (aham) - I

(pronoun)

Nominative, masculine, singular of aham

aham - I

तदा (tadā) - then, at that time

(indeclinable)

महाप्रलय्ता (mahāpralaytā) - the state of great dissolution

(noun)

Nominative, feminine, singular of mahāpralaytā

mahāpralaytā - the state of great dissolution (mahāpralaya)

Compound type : Tatpurusha (mahāpralaya+tā)

• mahāpralaya – great dissolution, cosmic annihilation
  noun (masculine)
• tā – -ness, -hood (suffix forming abstract feminine nouns)
  noun (feminine)

वासनायाः (vāsanāyāḥ) - of latent impressions, of desires

(noun)

Genitive, feminine, singular of vāsanā

vāsanā - latent impression, mental trace, habit, desire

Root: vas (class 1)

च (ca) - and

(indeclinable)

संक्षयः (saṁkṣayaḥ) - complete destruction, annihilation, perishing

(noun)

Nominative, masculine, singular of saṃkṣaya

saṁkṣaya - complete destruction, annihilation, decrease, end

Prefix: sam

Root: kṣi (class 1)