योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-71, verse-4

परमेष्ठिन्यसंकल्पे तस्मिंस्तानवमेयुषि ।
सर्वगानन्तचिद्व्योमरूपोऽपश्यमहं यदा ॥ ४ ॥

parameṣṭhinyasaṃkalpe tasmiṃstānavameyuṣi ,
sarvagānantacidvyomarūpo'paśyamahaṃ yadā 4

4. parameṣṭhini asaṅkalpe tasmin tānavam eyuṣi
sarvagānantacidvyomarūpaḥ apaśyam aham yadā

4. yadā aham parameṣṭhini asaṅkalpe tasmin
tānavam eyuṣi sarvagānantacidvyomarūpaḥ apaśyam

4. When I perceived that Supreme Being (parameṣṭhin), devoid of conceptualization, having attained a subtle state, whose form is the all-pervading, infinite space of consciousness...

Words meanings summery:

• परमेष्ठिनि (parameṣṭhini) - in the Supreme Being (parameṣṭhin) (in the supreme being, in the creator, in the highest position)

• असङ्कल्पे (asaṅkalpe) - in the one without conceptualization (in the one devoid of volition, in the desireless one, in the one without conceptualization)

• तस्मिन् (tasmin) - in that (Supreme Being) (in that, in him)

• तानवम् (tānavam) - a subtle state, attenuation (subtlety, attenuation, minuteness)

• एयुषि (eyuṣi) - having attained (having gone, having reached, having attained)

• सर्वगानन्तचिद्व्योमरूपः (sarvagānantacidvyomarūpaḥ) - whose form is the all-pervading, infinite space of consciousness (whose form is the all-pervading, infinite consciousness-space)

• अपश्यम् (apaśyam) - I perceived (I saw, I perceived)

• अहम् (aham) - I

• यदा (yadā) - when (when, at which time)

Words meanings and morphology

परमेष्ठिनि (parameṣṭhini) - in the Supreme Being (parameṣṭhin) (in the supreme being, in the creator, in the highest position)

(noun)

Locative, masculine, singular of parameṣṭhin

parameṣṭhin - supreme being, creator, one in the highest position

असङ्कल्पे (asaṅkalpe) - in the one without conceptualization (in the one devoid of volition, in the desireless one, in the one without conceptualization)

(adjective)

Locative, masculine, singular of asaṅkalpa

asaṅkalpa - devoid of volition/intention/conceptualization/desire

Negation of saṅkalpa

Compound type : nañ-tatpuruṣa (a+saṅkalpa)

• a – not, non
  indeclinable
• saṅkalpa – volition, intention, conceptualization, resolve
  noun (masculine)
  Prefix: sam

Note: Agrees with parameṣṭhini

तस्मिन् (tasmin) - in that (Supreme Being) (in that, in him)

(pronoun)

Locative, masculine, singular of tat

tat - that, he, it

Note: Refers to parameṣṭhin

तानवम् (tānavam) - a subtle state, attenuation (subtlety, attenuation, minuteness)

(noun)

Accusative, neuter, singular of tānava

tānava - subtlety, attenuation, minuteness

From tanu + aṇ

Note: Object of eyuṣi

एयुषि (eyuṣi) - having attained (having gone, having reached, having attained)

(participle)

Locative, masculine, singular of eyuṣ

eyuṣ - having gone, having reached

Perfect Active Participle

From root 'i' (to go) + kvasu suffix

Root: i (class 2)

Note: Agrees with parameṣṭhini

सर्वगानन्तचिद्व्योमरूपः (sarvagānantacidvyomarūpaḥ) - whose form is the all-pervading, infinite space of consciousness (whose form is the all-pervading, infinite consciousness-space)

(adjective)

Nominative, masculine, singular of sarvagānantacidvyomarūpa

sarvagānantacidvyomarūpa - whose form is the all-pervading, infinite consciousness-space

Compound type : bahuvrīhi (sarvaga+ananta+cit+vyoman+rūpa)

• sarvaga – all-pervading, omnipresent
  adjective (masculine)
  Prefix: sarva
  Root: gam (class 1)
• ananta – endless, infinite, boundless
  adjective (masculine)
  Negation of anta (end)
  Prefix: a
• cit – consciousness, intelligence, thought
  noun (feminine)
• vyoman – sky, space, ether
  noun (neuter)
• rūpa – form, shape, nature, appearance
  noun (neuter)

Note: Predicative adjective for parameṣṭhin (implied saḥ or idam)

अपश्यम् (apaśyam) - I perceived (I saw, I perceived)

(verb)

1st person , singular, active, past imperfect (laṅ) of paś

Imperfect

Root dṛś, takes paś in present/imperfect

Root: dṛś (class 1)

अहम् (aham) - I

(pronoun)

Nominative, singular of aham

aham - I

Note: Subject of apaśyam

यदा (yadā) - when (when, at which time)

(indeclinable)

Note: Introduces a temporal clause