योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-4, verse-43

अहमित्यर्थदुस्तैललवो ब्रह्मणि वारिणि ।
प्रसृतो यत्तदाश्वेतत्त्रिजगच्चक्रकं स्थितम् ॥ ४३ ॥

ahamityarthadustailalavo brahmaṇi vāriṇi ,
prasṛto yattadāśvetattrijagaccakrakaṃ sthitam 43

43. aham iti artha-dustaila-lavaḥ brahmaṇi vāriṇi
prasṛtaḥ yat tadā āśvetat trijagac-cakrakam sthitam

43. yat tadā aham iti artha-dustaila-lavaḥ brahmaṇi vāriṇi prasṛtaḥ,
(tat) trijagac-cakrakam āśvetat sthitam.

43. When that extremely stubborn particle of "I" (ahaṅkāra) consciousness spreads within the water of Brahman, then this entire wheel of the three worlds becomes illuminated and established.

Words meanings summery:

• अहम् (aham) - the fundamental sense of "I" or ego (ahaṅkāra) (I, myself, ego, self-sense)

• इति (iti) - signalling a quote or a specific concept (thus, so, in this way)

• अर्थ-दुस्तैल-लवः (artha-dustaila-lavaḥ) - referring to the persistent and subtle nature of the ego (ahaṅkāra) (a particle of difficult oil for a purpose/meaning, a stubbornly persistent particle of oil)

• ब्रह्मणि (brahmaṇi) - in the ultimate reality (Brahman) (in Brahman)

• वारिणि (vāriṇi) - in the water, metaphorically representing the pure nature of Brahman (in the water)

• प्रसृतः (prasṛtaḥ) - when the ego-sense expands or becomes pervasive (spread out, expanded, diffused)

• यत् (yat) - when (indicating a condition) (that which, when, because)

• तदा (tadā) - then, as a consequence (then, at that time)

• आश्वेतत् (āśvetat) - it became visible, manifest, or pervaded brightly (it became white, it shone, it manifested)

• त्रिजगच्-चक्रकम् (trijagac-cakrakam) - the entire cosmos, consisting of the three traditional worlds (heaven, earth, underworld or subtle, causal, gross) (the wheel of the three worlds)

• स्थितम् (sthitam) - became established or fixed (stood, situated, established, existing)

Words meanings and morphology

अहम् (aham) - the fundamental sense of "I" or ego (ahaṅkāra) (I, myself, ego, self-sense)

(pronoun)

Nominative, singular of aham

aham - I, myself, ego, self-sense

इति (iti) - signalling a quote or a specific concept (thus, so, in this way)

(indeclinable)

अर्थ-दुस्तैल-लवः (artha-dustaila-lavaḥ) - referring to the persistent and subtle nature of the ego (ahaṅkāra) (a particle of difficult oil for a purpose/meaning, a stubbornly persistent particle of oil)

(noun)

Nominative, masculine, singular of artha-dustaila-lava

artha-dustaila-lava - a particle of oil difficult to dissolve or remove, stubbornly persistent particle

Compound type : tatpurusha (artha+dustaila+lava)

• artha – purpose, meaning, object, wealth
  noun (masculine)
• dustaila – bad oil, oil difficult to remove/dissolve
  noun (neuter)
  Prefix: dus
• lava – a particle, a drop, a small piece
  noun (masculine)

Note: Part of a compound: artha-dustaila-lava.

ब्रह्मणि (brahmaṇi) - in the ultimate reality (Brahman) (in Brahman)

(noun)

Locative, neuter, singular of brahman

brahman - the Absolute, ultimate reality, universal spirit

वारिणि (vāriṇi) - in the water, metaphorically representing the pure nature of Brahman (in the water)

(noun)

Locative, neuter, singular of vāri

vāri - water

प्रसृतः (prasṛtaḥ) - when the ego-sense expands or becomes pervasive (spread out, expanded, diffused)

(adjective)

Nominative, masculine, singular of prasṛta

prasṛta - spread out, expanded, diffused, manifest

Past Passive Participle

Derived from √sṛj (to send forth, create) with prefix pra-.

Prefix: pra

Root: sṛ (class 1)

Note: Qualifies "lavaḥ" (particle).

यत् (yat) - when (indicating a condition) (that which, when, because)

(indeclinable)

Note: Used here as a conjunction meaning 'when'.

तदा (tadā) - then, as a consequence (then, at that time)

(indeclinable)

आश्वेतत् (āśvetat) - it became visible, manifest, or pervaded brightly (it became white, it shone, it manifested)

(verb)

3rd person , singular, active, past imperfect (laṅ) of śvit

Imperfect, third person singular

Augmented form of the root śvit, with prefix ā.

Prefix: ā

Root: śvit (class 1)

Note: Refers to the wheel of the three worlds.

त्रिजगच्-चक्रकम् (trijagac-cakrakam) - the entire cosmos, consisting of the three traditional worlds (heaven, earth, underworld or subtle, causal, gross) (the wheel of the three worlds)

(noun)

Nominative, neuter, singular of trijagac-cakraka

trijagac-cakraka - the wheel of the three worlds

Compound type : tatpurusha (tri-jagat+cakraka)

• tri-jagat – the three worlds
  noun (neuter)
• cakraka – a small wheel, a circular form, a sphere
  noun (neuter)

Note: Compound of 'trijagat' (three worlds) and 'cakraka' (wheel).

स्थितम् (sthitam) - became established or fixed (stood, situated, established, existing)

(adjective)

Nominative, neuter, singular of sthita

sthita - stood, situated, established, existing, firm

Past Passive Participle

Derived from √sthā (to stand, remain).

Root: sthā (class 1)

Note: Qualifies 'trijagaccakrakam'.