योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-106, verse-17

निद्रायां विनिवृत्तायां यतो विश्वं प्रवर्तते ।
निवर्तते च यच्छान्तौ तच्चिदम्बरमुच्यते ॥ १७ ॥

nidrāyāṃ vinivṛttāyāṃ yato viśvaṃ pravartate ,
nivartate ca yacchāntau taccidambaramucyate 17

17. nidrāyām vinivṛttāyām yataḥ viśvam pravartate
nivartate ca yat śāntau tat citambaram ucyate

17. tat citambaram ucyate yataḥ viśvam pravartate
nidrāyām vinivṛttāyām ca yat śāntau nivartate

17. That is called the consciousness-ether, from which the universe originates when the state of sleep (or inaction) has ceased, and into whose cessation (or tranquility) it eventually dissolves.

Words meanings summery:

• निद्रायाम् (nidrāyām) - in sleep, in slumber

• विनिवृत्तायाम् (vinivṛttāyām) - in (something) having ceased/ended, when (something) has turned back

• यतः (yataḥ) - from which, whence, wherefore

• विश्वम् (viśvam) - the universe, the world, all

• प्रवर्तते (pravartate) - it proceeds, it functions, it begins

• निवर्तते (nivartate) - it ceases, it returns, it dissolves

• च (ca) - and, also

• यत् (yat) - whose, of which

• शान्तौ (śāntau) - in tranquility, in peace, in cessation

• तत् (tat) - that, it

• चितम्बरम् (citambaram) - consciousness-ether, space of consciousness

• उच्यते (ucyate) - is called, is said

Words meanings and morphology

निद्रायाम् (nidrāyām) - in sleep, in slumber

(noun)

Locative, feminine, singular of nidrā

nidrā - sleep, slumber, rest

विनिवृत्तायाम् (vinivṛttāyām) - in (something) having ceased/ended, when (something) has turned back

(adjective)

Locative, feminine, singular of vinivṛtta

vinivṛtta - ceased, stopped, turned back, returned

Past Passive Participle

Past Passive Participle of root 'vṛt' (to turn, exist) with prefixes 'vi' and 'ni'.

Prefixes: vi+ni

Root: vṛt (class 1)

Note: Agrees with 'nidrāyām'.

यतः (yataḥ) - from which, whence, wherefore

(indeclinable)

Note: Ablative form of 'yad', used as an adverb meaning 'from which'.

विश्वम् (viśvam) - the universe, the world, all

(noun)

Nominative, neuter, singular of viśva

viśva - all, whole, entire; the universe, the world

Note: Subject of 'pravartate'.

प्रवर्तते (pravartate) - it proceeds, it functions, it begins

(verb)

3rd person , singular, middle, present (laṭ) of pra-vṛt

Present Middle

Root 'vṛt' (class 1, 'vṛtu' vartane) with prefix 'pra', in middle voice, third person singular.

Prefix: pra

Root: vṛt (class 1)

निवर्तते (nivartate) - it ceases, it returns, it dissolves

(verb)

3rd person , singular, middle, present (laṭ) of ni-vṛt

Present Middle

Root 'vṛt' (class 1, 'vṛtu' vartane) with prefix 'ni', in middle voice, third person singular.

Prefix: ni

Root: vṛt (class 1)

च (ca) - and, also

(indeclinable)

Note: Conjunction.

यत् (yat) - whose, of which

(pronoun)

Genitive, singular of yad

yad - which, what

Note: This 'yat' is likely part of a possessive compound 'yat-śāntau' (in whose tranquility).

शान्तौ (śāntau) - in tranquility, in peace, in cessation

(noun)

Locative, feminine, singular of śānti

śānti - peace, tranquility, cessation, quietude

From root śam (to be calm, cease).

Root: śam (class 4)

तत् (tat) - that, it

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Referring to the cidambaram.

चितम्बरम् (citambaram) - consciousness-ether, space of consciousness

(noun)

Nominative, neuter, singular of citambara

citambara - consciousness-ether, space of consciousness

Compound type : tatpuruṣa (cit+ambara)

• cit – consciousness, intelligence, thought
  noun (feminine)
  From root cit (to perceive, observe, know).
  Root: cit (class 1)
• ambara – sky, space, ether, garment
  noun (neuter)

उच्यते (ucyate) - is called, is said

(verb)

3rd person , singular, passive, present (laṭ) of vac

Present Passive

Root 'vac' (class 2, 'vaca' paribhāṣaṇe) in passive voice, third person singular. 'vac' changes to 'uc' in passive stem.

Root: vac (class 2)