योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-22, verse-10

असत्यप्रतिभासानामेतदेवाशु कारणम् ।
यदनालोकनं नाम समालोकक्षणक्षयम् ॥ १० ॥

asatyapratibhāsānāmetadevāśu kāraṇam ,
yadanālokanaṃ nāma samālokakṣaṇakṣayam 10

10. asatyapratibhāsānām etat eva āśu kāraṇam
yat anālokanaṃ nāma samālokakṣaṇakṣayam

10. asatyapratibhāsānām āśu kāraṇam etat eva
yat nāma anālokanaṃ samālokakṣaṇakṣayam

10. The immediate cause of unreal appearances is precisely this non-observation, which is called the annihilation of the moment of direct insight.

Words meanings summery:

• असत्यप्रतिभासानाम् (asatyapratibhāsānām) - of unreal appearances, of false perceptions

• एतत् (etat) - this, this very thing

• एव (eva) - precisely, just, only, indeed

• आशु (āśu) - quickly, immediately, swiftly

• कारणम् (kāraṇam) - cause, reason, instrument

• यत् (yat) - which, that, because, since

• अनालोकनं (anālokanaṁ) - non-observation, non-perception, lack of sight

• नाम (nāma) - by name, indeed, namely, what is called

• समालोकक्षणक्षयम् (samālokakṣaṇakṣayam) - the destruction of the moment of true perception/insight

Words meanings and morphology

असत्यप्रतिभासानाम् (asatyapratibhāsānām) - of unreal appearances, of false perceptions

(noun)

Genitive, neuter, plural of asatyapratibhāsana

asatyapratibhāsana - unreal appearance, false perception, illusion

Compound type : tatpuruṣa (asatya+pratibhāsana)

• asatya – unreal, false
  adjective (neuter)
  Prefix: a
• pratibhāsana – appearance, manifestation, perception
  noun (neuter)
  Derived from root bhās- with prefix prati-
  Prefix: prati
  Root: bhās (class 1)

एतत् (etat) - this, this very thing

(pronoun)

Nominative, neuter, singular of etad

etad - this

Note: Also used as an adjective. Here it refers to 'non-observation'.

एव (eva) - precisely, just, only, indeed

(indeclinable)

आशु (āśu) - quickly, immediately, swiftly

(indeclinable)

Note: Used adverbially here.

कारणम् (kāraṇam) - cause, reason, instrument

(noun)

Nominative, neuter, singular of kāraṇa

kāraṇa - cause, reason, motive, instrument

Derived from root kṛ + anaT suffix.

Root: kṛ (class 8)

Note: Predicate nominative.

यत् (yat) - which, that, because, since

(pronoun)

Nominative, neuter, singular of yad

yad - which, that, what

Relative pronoun.

Note: Refers to 'etat'.

अनालोकनं (anālokanaṁ) - non-observation, non-perception, lack of sight

(noun)

Nominative, neuter, singular of anālokana

anālokana - non-observation, lack of perception, not seeing

Compound of 'a' (negative) and 'ālokana' (observation).

Compound type : nañ-tatpuruṣa (na+ālokana)

• na – not, no
  indeclinable
• ālokana – seeing, observation, perception, looking
  noun (neuter)
  Derived from root lok- with prefix ā-
  Prefix: ā
  Root: lok (class 10)

नाम (nāma) - by name, indeed, namely, what is called

(indeclinable)

समालोकक्षणक्षयम् (samālokakṣaṇakṣayam) - the destruction of the moment of true perception/insight

(noun)

Nominative, neuter, singular of samālokakṣaṇakṣaya

samālokakṣaṇakṣaya - destruction of the moment of right perception/insight

Compound.

Compound type : tatpuruṣa (samāloka+kṣaṇa+kṣaya)

• samāloka – right perception, perfect vision, direct insight
  noun (masculine)
  Derived from root lok- with prefixes sam- and ā-
  Prefixes: sam+ā
  Root: lok (class 10)
• kṣaṇa – moment, instant, leisure
  noun (masculine)
• kṣaya – destruction, decay, loss, end
  noun (masculine)
  Derived from root kṣi- (to destroy)
  Root: kṣi (class 5)

Note: Grammatically nominative singular neuter, agreeing with 'anālokanam'.