योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-63, verse-8

इति प्रथममाज्ञातं चिद्योऽहं चित्ततां गतः ।
सर्वसंपन्नसर्वज्ञगगनादिविभावनात् ॥ ८ ॥

iti prathamamājñātaṃ cidyo'haṃ cittatāṃ gataḥ ,
sarvasaṃpannasarvajñagaganādivibhāvanāt 8

8. iti prathamam ājñātam cit yaḥ aham cittatām
gataḥ sarvasampannasarvajñagaganādivibhāvanāt

8. iti prathamam aham cit yaḥ
sarvasampannasarvajñagaganādivibhāvanāt cittatām gataḥ ājñātam

8. Thus, it was first understood that I, pure consciousness (cit), attained the state of mind (cittatā) through the mental conception or realization (vibhāvanā) of myself as being endowed with everything, omniscient, and like space, etc.

Words meanings summery:

• इति (iti) - thus, so, in this manner

• प्रथमम् (prathamam) - first, at first, firstly

• आज्ञातम् (ājñātam) - known, understood, realized

• चित् (cit) - pure consciousness (consciousness, pure awareness, intelligence, spirit)

• यः (yaḥ) - who, which

• अहम् (aham) - I, myself

• चित्तताम् (cittatām) - the state of mind, mentality, mind-ness

• गतः (gataḥ) - attained, became (gone, attained, reached, become)

• सर्वसम्पन्नसर्वज्ञगगनादिविभावनात् (sarvasampannasarvajñagaganādivibhāvanāt) - from the realization/conception of being endowed with everything, omniscient, like space, etc.

Words meanings and morphology

इति (iti) - thus, so, in this manner

(indeclinable)

प्रथमम् (prathamam) - first, at first, firstly

(indeclinable)

Note: Adverbial usage of neuter accusative singular.

आज्ञातम् (ājñātam) - known, understood, realized

(adjective)

Nominative, neuter, singular of ājñāta

ājñāta - known, understood, commanded

Past Passive Participle

From root jñā (to know) with upasarga ā-

Prefix: ā

Root: jñā (class 9)

Note: Refers to "it" (the fact that I, cit, became cittatā).

चित् (cit) - pure consciousness (consciousness, pure awareness, intelligence, spirit)

(noun)

Nominative, feminine, singular of cit

cit - consciousness, pure awareness, mind, spirit

Note: Refers to the pure essence of consciousness.

यः (yaḥ) - who, which

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what, that

Note: Relative pronoun, referring to aham (which refers to cit).

अहम् (aham) - I, myself

(pronoun)

Nominative, singular of asmad

asmad - I, myself, we

Note: Refers to the first person subjective experience.

चित्तताम् (cittatām) - the state of mind, mentality, mind-ness

(noun)

Accusative, feminine, singular of cittatā

cittatā - state of mind, mentality, mind-ness

From citta (mind) + tā (suffix for state/quality)

Note: Object of gataḥ.

गतः (gataḥ) - attained, became (gone, attained, reached, become)

(adjective)

Nominative, masculine, singular of gata

gata - gone, arrived, attained, become, reached

Past Passive Participle

From root gam (to go)

Root: gam (class 1)

Note: Qualifies aham (masculine form indicating agreement with aham through yaḥ).

सर्वसम्पन्नसर्वज्ञगगनादिविभावनात् (sarvasampannasarvajñagaganādivibhāvanāt) - from the realization/conception of being endowed with everything, omniscient, like space, etc.

(noun)

Ablative, neuter, singular of sarvasampannasarvajñagaganādivibhāvana

sarvasampannasarvajñagaganādivibhāvana - conception/realization of being all-accomplished, omniscient, and like space, etc.

Compound type : tatpuruṣa (sarvasampanna+sarvajña+gaganādi+vibhāvana)

• sarvasampanna – endowed with everything, perfectly accomplished
  adjective (masculine)
  Past Passive Participle
  From root pad (to go, attain) with sam-ā-
  Prefixes: sam+ā
  Root: pad (class 4)
• sarvajña – omniscient, all-knowing
  adjective (masculine)
  From sarva (all) + jña (knowing)
  Root: jñā (class 9)
• gaganādi – space, etc.; beginning with space
  noun (masculine)
  From gagana (space) + ādi (beginning, etc.)
• vibhāvana – conception, imagination, realization, ascertainment
  noun (neuter)
  From root bhū (to be) with vi-ā- + ṇaC suffix
  Prefixes: vi+ā
  Root: bhū (class 1)

Note: Indicates the cause or means.