योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-177, verse-16

अतज्ज्ञत्वं च बोधेऽन्तरवभाति तदङ्गता ।
गते स्वप्नसुषुप्तेऽन्तरिव निद्रात्म केवलम् ॥ १६ ॥

atajjñatvaṃ ca bodhe'ntaravabhāti tadaṅgatā ,
gate svapnasuṣupte'ntariva nidrātma kevalam 16

16. atattvajñatvam ca bodhe antaḥ avabhāti tat-aṅgatā
gate svapna-suṣupte antaḥ iva nidrā-ātman kevalam

16. svapna-suṣupte gate,
antaḥ iva kevalam nidrā-ātman,
bodhe antaḥ atattvajñatvam ca tat-aṅgatā avabhāti

16. Ignorance (atattvajñatvam) manifests within consciousness as if it were an inherent aspect of it. This is analogous to how, after the states of dream and deep sleep have passed, only the fundamental essence of sleep (nidrā-ātman) remains within.

Words meanings summery:

• अतत्त्वज्ञत्वम् (atattvajñatvam) - Ignorance regarding the true nature of reality (Brahman/Self). (non-knowledge, ignorance of reality)

• च (ca) - and, also

• बोधे (bodhe) - in consciousness, in understanding

• अन्तः (antaḥ) - within, inside

• अवभाति (avabhāti) - appears, shines forth, manifests

• तत्-अङ्गता (tat-aṅgatā) - Its integral nature (of non-knowledge) to consciousness. (its being a part, its integral nature)

• गते (gate) - When the states of dream and deep sleep have ceased. (having gone, ceased, passed)

• स्वप्न-सुषुप्ते (svapna-suṣupte) - In the states of dream and deep sleep. (in dream and deep sleep)

• अन्तः (antaḥ) - within, inside

• इव (iva) - like, as if, similar to

• निद्रा-आत्मन् (nidrā-ātman) - The underlying pure consciousness or essential state that remains after dream and deep sleep experiences, often referred to as `ātman` in such philosophical contexts. (the self of sleep, the nature of sleep, the pure sleep)

• केवलम् (kevalam) - Emphasizes that only the essence of sleep remains, stripped of specific dream content. (merely, only, pure, absolute)

Words meanings and morphology

अतत्त्वज्ञत्वम् (atattvajñatvam) - Ignorance regarding the true nature of reality (Brahman/Self). (non-knowledge, ignorance of reality)

(noun)

Nominative, neuter, singular of atattvajñatva

atattvajñatva - non-knowledge of reality, ignorance

Abstract noun from 'a-tattva-jña' (not knowing reality) + '-tva'.

Compound type : tatpuruṣa (a+tattva+jña)

• a – not, non-
  indeclinable
  Negative prefix.
• tattva – reality, truth, principle, essence
  noun (neuter)
  From `tad` (that) + `-tva` (suffix for abstract noun).
• jña – knower, understanding
  adjective (masculine)
  Agent noun
  From root `jñā` (to know).
  Root: jñā (class 9)

च (ca) - and, also

(indeclinable)

बोधे (bodhe) - in consciousness, in understanding

(noun)

Locative, masculine, singular of bodha

bodha - consciousness, understanding, awakening, knowledge

From root `budh` (to know, awaken).

Root: budh (class 1)

अन्तः (antaḥ) - within, inside

(indeclinable)

Original form of `antaḥ` when used as a preposition or adverb.

अवभाति (avabhāti) - appears, shines forth, manifests

(verb)

3rd person , singular, active, present (laṭ) of avabhā

Present active indicative, 3rd person singular.

From root `bhā` (to shine) with prefix `ava-`.

Prefix: ava

Root: bhā (class 2)

तत्-अङ्गता (tat-aṅgatā) - Its integral nature (of non-knowledge) to consciousness. (its being a part, its integral nature)

(noun)

Nominative, feminine, singular of tadaṅgatā

tadaṅgatā - the state of being a part of that, its integrality

Compound of `tat` (that) + `aṅga` (limb, part) + `tā` (suffix for abstract noun).

Compound type : tatpuruṣa (tad+aṅga)

• tad – that, it
  pronoun (neuter)
• aṅga – limb, part, component, constituent
  noun (neuter)

Note: The `tā` suffix makes the noun feminine.

गते (gate) - When the states of dream and deep sleep have ceased. (having gone, ceased, passed)

(adjective)

Locative, neuter, dual of gata

gata - gone, past, departed, ceased

Past Passive Participle

From root `gam` (to go).

Root: gam (class 1)

Note: Dual locative because it refers to `svapna-suṣupte`.

स्वप्न-सुषुप्ते (svapna-suṣupte) - In the states of dream and deep sleep. (in dream and deep sleep)

(noun)

Locative, neuter, dual of svapna-suṣupti

svapna-suṣupti - dream and deep sleep (states)

Dvandva compound of `svapna` (dream) and `suṣupti` (deep sleep).

Compound type : dvandva (svapna+suṣupti)

• svapna – dream, sleep
  noun (masculine)
  From root `svap` (to sleep).
  Root: svap (class 2)
• suṣupti – deep sleep
  noun (feminine)
  From root `svap` (to sleep) with `su-` and suffix `-ti`.
  Prefix: su
  Root: svap (class 2)

Note: The ending `-e` is for dual locative for neuter nouns ending in `a`.

अन्तः (antaḥ) - within, inside

(indeclinable)

Original form of `antaḥ` when used as a preposition or adverb.

इव (iva) - like, as if, similar to

(indeclinable)

निद्रा-आत्मन् (nidrā-ātman) - The underlying pure consciousness or essential state that remains after dream and deep sleep experiences, often referred to as `ātman` in such philosophical contexts. (the self of sleep, the nature of sleep, the pure sleep)

(noun)

Nominative, masculine, singular of nidrā-ātman

nidrā-ātman - the essence/self of sleep

Tatpurusha compound of `nidrā` (sleep) and `ātman` (self/essence).

Compound type : tatpuruṣa (nidrā+ātman)

• nidrā – sleep
  noun (feminine)
  From root `nid` (to sleep) or `snih`.
  Root: nid (class 1)
• ātman – self, soul, essence, spirit, individual soul, Supreme Soul
  noun (masculine)
  Root: at (class 1)

Note: `nidrā-ātma` in `roman_words_separated` is `nidrātma` which is `nidrā-ātman` in sandhi. `nidrā-ātman` as base, nominative singular, is also `nidrā-ātman`.

केवलम् (kevalam) - Emphasizes that only the essence of sleep remains, stripped of specific dream content. (merely, only, pure, absolute)

(indeclinable)

Note: Functions adverbially here, modifying the state of remaining.