योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-14, verse-6

कदाचिदासीत्तस्येच्छा प्रबोधबलशालिनः ।
ब्रह्मतत्त्वमवेक्षेऽहं यथावद्ध्यानवानिति ॥ ६ ॥

kadācidāsīttasyecchā prabodhabalaśālinaḥ ,
brahmatattvamavekṣe'haṃ yathāvaddhyānavāniti 6

6. kadācit āsīt tasya icchā prabodhabalaśālinaḥ
brahmatattvam avekṣe aham yathāvat dhyānavān iti

6. kadācit tasya prabodhabalaśālinaḥ icchā āsīt aham
dhyānavān (san) brahmatattvam yathāvat avekṣe iti

6. Once, a desire arose in him, who was powerful due to the strength of his awakening (prabodha), thinking: "I, being meditative (dhyāna), shall observe the true nature of the Absolute Reality (brahman) properly."

Words meanings summery:

• कदाचित् (kadācit) - once, sometimes, at some time

• आसीत् (āsīt) - was, existed, happened

• तस्य (tasya) - his, of him

• इच्छा (icchā) - desire, wish

• प्रबोधबलशालिनः (prabodhabalaśālinaḥ) - of him who possesses the strength of awakening/knowledge

• ब्रह्मतत्त्वम् (brahmatattvam) - the true nature of Brahman, the essence of the Absolute Reality

• अवेक्षे (avekṣe) - I shall observe, I should examine

• अहम् (aham) - I

• यथावत् (yathāvat) - properly, truly, as it is, thoroughly

• ध्यानवान् (dhyānavān) - meditative, endowed with meditation

• इति (iti) - thus, in this manner (indicating direct speech or thought)

Words meanings and morphology

कदाचित् (kadācit) - once, sometimes, at some time

(indeclinable)

आसीत् (āsīt) - was, existed, happened

(verb)

3rd person , singular, active, Imperfect (luṅ) of as

Imperfect Active

Imperfect 3rd person singular active

Root: as (class 2)

तस्य (tasya) - his, of him

(pronoun)

Genitive, masculine, singular of tad

tad - that, he, she, it

इच्छा (icchā) - desire, wish

(noun)

Nominative, feminine, singular of icchā

icchā - desire, wish, intention

Noun of action

Derived from root √iṣ (to wish, desire)

Root: iṣ (class 4)

प्रबोधबलशालिनः (prabodhabalaśālinaḥ) - of him who possesses the strength of awakening/knowledge

(adjective)

Genitive, masculine, singular of prabodhabalaśālin

prabodhabalaśālin - possessing the strength of awakening/enlightenment

Compound type : Bahuvrīhi (prabodhabala+śālin)

• prabodha – awakening, enlightenment, knowledge, consciousness
  noun (masculine)
  Noun of action
  Derived from root √budh (to awaken) with prefix 'pra'
  Prefix: pra
  Root: budh (class 1)
• bala – strength, power, force
  noun (neuter)
• śālin – endowed with, possessing, rich in
  adjective (masculine)
  Suffix -śālin indicating possession

ब्रह्मतत्त्वम् (brahmatattvam) - the true nature of Brahman, the essence of the Absolute Reality

(noun)

Accusative, neuter, singular of brahmatattva

brahmatattva - the truth/essence of Brahman

Compound type : Tatpuruṣa (brahman+tattva)

• brahman – the Absolute Reality, ultimate reality, universal spirit
  noun (neuter)
• tattva – truth, reality, essence, principle
  noun (neuter)

अवेक्षे (avekṣe) - I shall observe, I should examine

(verb)

1st person , singular, middle, Optative/Potential (liṅ) of īkṣ

Optative/Potential Middle

Optative/Potential 1st person singular middle with prefix 'ava'

Prefix: ava

Root: īkṣ (class 1)

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we

यथावत् (yathāvat) - properly, truly, as it is, thoroughly

(indeclinable)

Derived from yathā + vat suffix

ध्यानवान् (dhyānavān) - meditative, endowed with meditation

(adjective)

Nominative, masculine, singular of dhyānavat

dhyānavat - possessing meditation, meditative

Possessive adjective formed with 'matup' suffix from 'dhyāna'

इति (iti) - thus, in this manner (indicating direct speech or thought)

(indeclinable)