योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-80, verse-18

आत्मज्ञो वाप्यनात्मज्ञः सिद्ध्यर्थे लीलयाथवा ।
कथं संसाधयत्येतद्यथा तद्वद मे प्रभो ॥ १८ ॥

ātmajño vāpyanātmajñaḥ siddhyarthe līlayāthavā ,
kathaṃ saṃsādhayatyetadyathā tadvada me prabho 18

18. ātmajñaḥ vā api anātmajñaḥ siddhyarthe līlayā athavā
katham saṃsādhayati etat yathā tat vada me prabho

18. prabho me vada tat yathā ātmajñaḥ vā api anātmajñaḥ
siddhyarthe athavā līlayā etat katham saṃsādhayati

18. O Lord, tell me how one accomplishes this, whether as a knower of the self (ātman) or a non-knower of the self (ātman), whether for the sake of spiritual perfection or playfully.

Words meanings summery:

• आत्मज्ञः (ātmajñaḥ) - one who knows the self, a knower of the soul

• वा (vā) - or, either

• अपि (api) - whether, expressing an alternative (also, even, too, whether)

• अनात्मज्ञः (anātmajñaḥ) - one who does not know the self, ignorant of the self

• सिद्ध्यर्थे (siddhyarthe) - for the sake of spiritual perfection or attainment (for the purpose of perfection, for the sake of accomplishment)

• लीलया (līlayā) - playfully, effortlessly (indicating ease of accomplishment) (playfully, easily, sportively, effortlessly)

• अथवा (athavā) - or, otherwise

• कथम् (katham) - how? in what manner?

• संसाधयति (saṁsādhayati) - accomplishes, achieves, brings about perfectly

• एतत् (etat) - this (referring to the topic of discussion, accomplishment) (this, that)

• यथा (yathā) - as, just as, in what way

• तत् (tat) - that, so, thus

• वद (vada) - tell me (tell, speak, say)

• मे (me) - to me, for me

• प्रभो (prabho) - Addressed to Lord Rāma (the speaker is Vasiṣṭha) (O Lord, O Master)

Words meanings and morphology

आत्मज्ञः (ātmajñaḥ) - one who knows the self, a knower of the soul

(noun)

Nominative, masculine, singular of ātmajña

ātmajña - knower of the self (ātman), one who has realized the soul

Compound type : tatpuruṣa (ātman+jña)

• ātman – self, soul, individual soul, supreme soul, essence
  noun (masculine)
• jña – knowing, knower, intelligent
  adjective (masculine)
  Derived from root jñā (to know) with kṛt suffix ḍa
  Root: jñā (class 9)

वा (vā) - or, either

(indeclinable)

अपि (api) - whether, expressing an alternative (also, even, too, whether)

(indeclinable)

अनात्मज्ञः (anātmajñaḥ) - one who does not know the self, ignorant of the self

(noun)

Nominative, masculine, singular of anātmajña

anātmajña - not knowing the self (ātman), ignorant of the soul

Compound type : nañ-tatpuruṣa (an+ātmajña)

• an – not, un-, non-
  indeclinable
• ātmajña – knower of the self (ātman)
  noun (masculine)
  Root: jñā (class 9)

सिद्ध्यर्थे (siddhyarthe) - for the sake of spiritual perfection or attainment (for the purpose of perfection, for the sake of accomplishment)

(noun)

Locative, masculine, singular of siddhyartha

siddhyartha - for the sake of success, for the purpose of accomplishment/perfection

Compound type : tatpuruṣa (siddhi+artha)

• siddhi – accomplishment, success, perfection, supernatural power
  noun (feminine)
  Root: sidh (class 4)
• artha – purpose, aim, meaning, wealth, object
  noun (masculine)

Note: The locative case ending -e is used here to denote purpose.

लीलया (līlayā) - playfully, effortlessly (indicating ease of accomplishment) (playfully, easily, sportively, effortlessly)

(noun)

Instrumental, feminine, singular of līlā

līlā - play, sport, ease, grace, mere appearance

Root: līl (class 10)

Note: The instrumental case expresses the manner or means.

अथवा (athavā) - or, otherwise

(indeclinable)

कथम् (katham) - how? in what manner?

(indeclinable)

संसाधयति (saṁsādhayati) - accomplishes, achieves, brings about perfectly

(verb)

3rd person , singular, active, present indicative (laṭ) of saṃsādh

causative of √sādh with prefix sam

Causative stem sādhaya- from √sādh (to succeed, accomplish). Present 3rd singular active.

Prefix: sam

Root: sādh (class 5)

एतत् (etat) - this (referring to the topic of discussion, accomplishment) (this, that)

(pronoun)

Accusative, neuter, singular of etad

etad - this, that

यथा (yathā) - as, just as, in what way

(indeclinable)

तत् (tat) - that, so, thus

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Note: Often corresponds to 'yathā' (as...so). Here, 'how that is' implies 'how that [accomplishment] is [effected]'.

वद (vada) - tell me (tell, speak, say)

(verb)

2nd person , singular, active, imperative (loṭ) of vad

Imperative 2nd singular active

Root: vad (class 1)

मे (me) - to me, for me

(pronoun)

singular of asmad

asmad - I, we

Note: Here in the dative sense, 'to me'.

प्रभो (prabho) - Addressed to Lord Rāma (the speaker is Vasiṣṭha) (O Lord, O Master)

(noun)

Vocative, masculine, singular of prabhu

prabhu - lord, master, ruler, mighty

Root: bhū (class 1)