योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-92, verse-18

तत्त्वज्ञानं मनोनाशो वासनाक्षय एव च ।
मिथः कारणतां गत्वादुःसाध्यानि स्थितान्यतः ॥ १८ ॥

tattvajñānaṃ manonāśo vāsanākṣaya eva ca ,
mithaḥ kāraṇatāṃ gatvāduḥsādhyāni sthitānyataḥ 18

18. tattvajñānam manonāśaḥ vāsanākṣayaḥ eva ca
mithaḥ kāraṇatām gatvā duḥsādhyāni sthitāni ataḥ

18. tattvajñānam manonāśaḥ vāsanākṣayaḥ eva ca
mithaḥ kāraṇatām gatvā ataḥ duḥsādhyāni sthitāni

18. The knowledge of reality (tattva), the destruction of the mind, and the cessation of latent impressions (vāsanā) are interdependent, each being the cause of the others. Therefore, these three stand as inherently difficult to accomplish.

Words meanings summery:

• तत्त्वज्ञानम् (tattvajñānam) - knowledge of reality/truth

• मनोनाशः (manonāśaḥ) - destruction of the mind, annihilation of mental activity

• वासनाक्षयः (vāsanākṣayaḥ) - cessation of latent impressions/desires

• एव (eva) - indeed, only, just, even

• च (ca) - and, also, moreover

• मिथः (mithaḥ) - mutually, reciprocally, together

• कारणताम् (kāraṇatām) - state of being a cause, causality

• गत्वा (gatvā) - having gone, having become, having reached

• दुःसाध्यानि (duḥsādhyāni) - difficult to accomplish, hard to achieve

• स्थितानि (sthitāni) - remained, established, standing

• अतः (ataḥ) - therefore, hence, from this

Words meanings and morphology

तत्त्वज्ञानम् (tattvajñānam) - knowledge of reality/truth

(noun)

Nominative, neuter, singular of tattvajñāna

tattvajñāna - knowledge of truth/reality, wisdom of principles

Compound type : tatpuruṣa (tattva+jñāna)

• tattva – reality, truth, principle, true state
  noun (neuter)
• jñāna – knowledge, wisdom, understanding
  noun (neuter)
  Root: jñā (class 9)

मनोनाशः (manonāśaḥ) - destruction of the mind, annihilation of mental activity

(noun)

Nominative, masculine, singular of manonāśa

manonāśa - destruction of the mind, mental annihilation

Compound type : tatpuruṣa (manas+nāśa)

• manas – mind, intellect, thought
  noun (neuter)
  Root: man (class 4)
• nāśa – destruction, loss, ruin, disappearance
  noun (masculine)
  Root: naś (class 4)

वासनाक्षयः (vāsanākṣayaḥ) - cessation of latent impressions/desires

(noun)

Nominative, masculine, singular of vāsanākṣaya

vāsanākṣaya - cessation of latent impressions/desires

Compound type : tatpuruṣa (vāsanā+kṣaya)

• vāsanā – latent impression, tendency, desire, perfume
  noun (feminine)
  Root: vas (class 1)
• kṣaya – destruction, cessation, loss, waste
  noun (masculine)
  Root: kṣi (class 1)

एव (eva) - indeed, only, just, even

(indeclinable)

च (ca) - and, also, moreover

(indeclinable)

मिथः (mithaḥ) - mutually, reciprocally, together

(indeclinable)

कारणताम् (kāraṇatām) - state of being a cause, causality

(noun)

Accusative, feminine, singular of kāraṇatā

kāraṇatā - causality, the state of being a cause

गत्वा (gatvā) - having gone, having become, having reached

(indeclinable)

absolutive

Derived from root gam with suffix -tvā.

Root: gam (class 1)

दुःसाध्यानि (duḥsādhyāni) - difficult to accomplish, hard to achieve

(adjective)

Nominative, neuter, plural of duḥsādhya

duḥsādhya - difficult to accomplish/effect, hard to conquer

gerundive

Derived from root sādh with prefix duḥ and suffix -ya

Prefix: duḥ

Root: sādh (class 5)

स्थितानि (sthitāni) - remained, established, standing

(adjective)

Nominative, neuter, plural of sthita

sthita - stood, standing, situated, remaining, existing, firm

past passive participle

Derived from root sthā with suffix -ta.

Root: sthā (class 1)

अतः (ataḥ) - therefore, hence, from this

(indeclinable)