योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-114, verse-40

एतद्बुद्ध्वा यथा व्योम्नि दृश्यमानोऽपि कालिमा ।
न कालिमेति बुद्धिः स्यादविद्यातिमिरं तथा ॥ ४० ॥

etadbuddhvā yathā vyomni dṛśyamāno'pi kālimā ,
na kālimeti buddhiḥ syādavidyātimiraṃ tathā 40

40. etat buddhvā yathā vyomni dṛśyamānaḥ api kālimā |
na kālimā iti buddhiḥ syāt avidyā timiram tathā ||

40. etat buddhvā,
yathā vyomni dṛśyamānaḥ api kālimā,
kālimā iti buddhiḥ na syāt,
tathā avidyā timiram [syāt].

40. Having understood this, just as the blackness (kālimā) perceived in the sky is not actual blackness, and one's intellect (buddhi) does not consider it such, similarly, ignorance (avidyā) is like a blinding darkness (timiram).

Words meanings summery:

• एतत् (etat) - this (truth/fact) (this)

• बुद्ध्वा (buddhvā) - having understood, having known

• यथा (yathā) - just as, as

• व्योम्नि (vyomni) - in the sky, in space, in the atmosphere

• दृश्यमानः (dṛśyamānaḥ) - being seen, appearing, visible

• अपि (api) - even, although, also

• कालिमा (kālimā) - blackness (as perceived in the sky) (blackness, darkness)

• न (na) - not, no

• कालिमा (kālimā) - actual blackness (blackness, darkness)

• इति (iti) - marking the conceptual content of buddhi (thus, so, (quotation marker))

• बुद्धिः (buddhiḥ) - intellect, understanding, mind

• स्यात् (syāt) - might be, should be, would be

• अविद्या (avidyā) - ignorance, spiritual ignorance, nescience

• तिमिरम् (timiram) - blinding darkness (like a disease of the eyes) (darkness, blindness, ophthalmic darkness)

• तथा (tathā) - similarly, in that way, so

Words meanings and morphology

एतत् (etat) - this (truth/fact) (this)

(pronoun)

Accusative, neuter, singular of etad

etad - this, that

बुद्ध्वा (buddhvā) - having understood, having known

(indeclinable)

Absolutive (Gerund)

Formed from root budh with suffix -tvā

Root: budh (class 1)

यथा (yathā) - just as, as

(indeclinable)

व्योम्नि (vyomni) - in the sky, in space, in the atmosphere

(noun)

Locative, neuter, singular of vyoman

vyoman - sky, atmosphere, space

दृश्यमानः (dṛśyamānaḥ) - being seen, appearing, visible

(participle)

Nominative, masculine, singular of dṛśyamāna

dṛśyamāna - being seen, visible

Present Passive Participle

Formed from root dṛś with suffix -yamāna

Root: dṛś (class 1)

अपि (api) - even, although, also

(indeclinable)

कालिमा (kālimā) - blackness (as perceived in the sky) (blackness, darkness)

(noun)

Nominative, masculine, singular of kāliman

kāliman - blackness, dark color

न (na) - not, no

(indeclinable)

कालिमा (kālimā) - actual blackness (blackness, darkness)

(noun)

Nominative, masculine, singular of kāliman

kāliman - blackness, dark color

इति (iti) - marking the conceptual content of buddhi (thus, so, (quotation marker))

(indeclinable)

बुद्धिः (buddhiḥ) - intellect, understanding, mind

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, mind

Root: budh (class 1)

स्यात् (syāt) - might be, should be, would be

(verb)

3rd person , singular, active, optative (vidhiliṅ) of as

Root: as (class 2)

अविद्या (avidyā) - ignorance, spiritual ignorance, nescience

(noun)

Nominative, feminine, singular of avidyā

avidyā - ignorance, nescience, spiritual ignorance (avidyā)

Compound type : nañ-tatpuruṣa (a+vidyā)

• a – not, non-, un-
  indeclinable
  Negative prefix
• vidyā – knowledge, learning, science
  noun (feminine)
  Root: vid (class 2)

तिमिरम् (timiram) - blinding darkness (like a disease of the eyes) (darkness, blindness, ophthalmic darkness)

(noun)

Nominative, neuter, singular of timira

timira - darkness, blindness, cataract, dimness

Root: tim (class 4)

तथा (tathā) - similarly, in that way, so

(indeclinable)