योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-57, verse-7

किल सत्यामविद्यायामज्ञतोदेति शाश्वती ।
बुद्धिमोहात्मिका यक्षी निर्देहैव यथा निशि ॥ ७ ॥

kila satyāmavidyāyāmajñatodeti śāśvatī ,
buddhimohātmikā yakṣī nirdehaiva yathā niśi 7

7. kila satyām avidyāyām ajñatā udeti śāśvatī
buddhi-moha-ātmikā yakṣī nirdehā eva yathā niśi

7. kila satyām avidyāyām buddhi-moha-ātmikā
nirdehā eva śāśvatī ajñatā udeti yathā niśi

7. Indeed, it is said that when nescience (avidyā) is truly present, an eternal ignorance (ajñatā) arises. This ignorance is like a yakṣī (female spirit) whose essence is the delusion of the intellect, truly bodiless, just like (appearances) in the night.

Words meanings summery:

• किल (kila) - indeed, certainly, they say

• सत्याम् (satyām) - in existing, in being real, in the true

• अविद्यायाम् (avidyāyām) - in nescience, in ignorance (avidyā)

• अज्ञता (ajñatā) - ignorance, lack of knowledge (ajñatā)

• उदेति (udeti) - arises, comes forth, rises

• शाश्वती (śāśvatī) - eternal, perpetual, everlasting

• बुद्धि-मोह-आत्मिका (buddhi-moha-ātmikā) - whose nature is the delusion of the intellect

• यक्षी (yakṣī) - a female spirit, a demoness, a celestial being

• निर्देहा (nirdehā) - bodiless, without a body

• एव (eva) - indeed, only

• यथा (yathā) - just as, as

• निशि (niśi) - in the night, at night

Words meanings and morphology

किल (kila) - indeed, certainly, they say

(indeclinable)

सत्याम् (satyām) - in existing, in being real, in the true

(adjective)

Locative, feminine, singular of sat

sat - being, existing, real, true, good

Present Active Participle

Feminine locative singular of present active participle of 'as' (to be).

Root: as (class 2)

अविद्यायाम् (avidyāyām) - in nescience, in ignorance (avidyā)

(noun)

Locative, feminine, singular of avidyā

avidyā - ignorance (avidyā), nescience, illusion

अज्ञता (ajñatā) - ignorance, lack of knowledge (ajñatā)

(noun)

Nominative, feminine, singular of ajñatā

ajñatā - ignorance (ajñatā), lack of knowledge

उदेति (udeti) - arises, comes forth, rises

(verb)

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

Prefix: ud

Root: i (class 2)

शाश्वती (śāśvatī) - eternal, perpetual, everlasting

(adjective)

Nominative, feminine, singular of śāśvata

śāśvata - eternal, perpetual, everlasting, constant

बुद्धि-मोह-आत्मिका (buddhi-moha-ātmikā) - whose nature is the delusion of the intellect

(adjective)

Nominative, feminine, singular of buddhi-moha-ātmika

buddhi-moha-ātmika - whose nature is the delusion of the intellect

Compound type : bahuvrīhi (buddhi+moha+ātmika)

• buddhi – intellect, understanding, mind, reason
  noun (feminine)
• moha – delusion, infatuation, bewilderment, folly
  noun (masculine)
• ātmika – belonging to the self/essence, consisting of, having the nature of
  adjective
  Suffix -ika added to ātman (self/essence).

यक्षी (yakṣī) - a female spirit, a demoness, a celestial being

(noun)

Nominative, feminine, singular of yakṣī

yakṣī - a female yaksha, a female spirit, a minor goddess

निर्देहा (nirdehā) - bodiless, without a body

(adjective)

Nominative, feminine, singular of nirdeha

nirdeha - bodiless, incorporeal, without a body

Compound type : bahuvrīhi (nis+deha)

• nis – without, out, free from
  indeclinable
• deha – body, form, person
  noun (masculine)

एव (eva) - indeed, only

(indeclinable)

यथा (yathā) - just as, as

(indeclinable)

निशि (niśi) - in the night, at night

(noun)

Locative, feminine, singular of niś

niś - night