योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-56, verse-15

चेतसो यदकर्तृत्वं तत्समाधानमुत्तमम् ।
तं विद्धि केवलीभावं सा शुभा निर्वृतिः परा ॥ १५ ॥

cetaso yadakartṛtvaṃ tatsamādhānamuttamam ,
taṃ viddhi kevalībhāvaṃ sā śubhā nirvṛtiḥ parā 15

15. cetasaḥ yat akartṛtvam tat samādhānam uttamam
tam viddhi kevalībhāvam sā śubhā nirvṛtiḥ parā

15. cetasaḥ yat akartṛtvam tat uttamam samādhānam (asti)
tam kevalībhāvam viddhi sā śubhā parā nirvṛtiḥ (asti)

15. The mind's non-doership is considered the supreme mental tranquility (samādhāna). Understand that as the state of pure isolation (kevalībhāva); that is the auspicious supreme peace.

Words meanings summery:

• चेतसः (cetasaḥ) - of the mind, of the consciousness

• यत् (yat) - that which, which, what

• अकर्तृत्वम् (akartṛtvam) - non-doership, non-agency

• तत् (tat) - that

• समाधानम् (samādhānam) - Refers to a state of profound mental tranquility (samādhāna). (concentration, mental tranquility, absorption)

• उत्तमम् (uttamam) - supreme, excellent, highest

• तम् (tam) - Refers to 'kevalībhāvam'. (that)

• विद्धि (viddhi) - know, understand

• केवलीभावम् (kevalībhāvam) - Refers to the state of pure isolation (kevalībhāva). (state of aloneness, pure isolation, absolute state)

• सा (sā) - Refers to 'nirvṛtiḥ'. (that, she)

• शुभा (śubhā) - auspicious, pure, beautiful

• निर्वृतिः (nirvṛtiḥ) - This term can signify supreme peace or liberation (nirvāṇa). (supreme bliss, peace, cessation, liberation)

• परा (parā) - supreme, highest, excellent

Words meanings and morphology

चेतसः (cetasaḥ) - of the mind, of the consciousness

(noun)

Genitive, neuter, singular of cetas

cetas - mind, consciousness, intellect

यत् (yat) - that which, which, what

(pronoun)

Nominative, neuter, singular of yat

yat - which, what, that which

अकर्तृत्वम् (akartṛtvam) - non-doership, non-agency

(noun)

Nominative, neuter, singular of akartṛtva

akartṛtva - non-doership, non-agency, state of being not a doer

Derived from 'akartṛ' (non-doer) + 'tva' (suffix for abstract noun).

Compound type : bahuvrīhi (a+kartṛ+tva)

• a – not, non-, un-
  indeclinable
• kartṛ – doer, agent
  noun (masculine)
  Agent noun from root kṛ (to do).
  Root: kṛ (class 8)
• tva – suffix for abstract noun, -ness, -hood
  indeclinable
  Nominal suffix forming abstract nouns.

तत् (tat) - that

(pronoun)

Nominative, neuter, singular of tad

tad - that, it

समाधानम् (samādhānam) - Refers to a state of profound mental tranquility (samādhāna). (concentration, mental tranquility, absorption)

(noun)

Nominative, neuter, singular of samādhāna

samādhāna - concentration, mental tranquility, absorption, profound meditation

Derived from prefix 'sam-ā-' and root 'dhā' (to place, to hold).

Prefixes: sam+ā

Root: dhā (class 3)

उत्तमम् (uttamam) - supreme, excellent, highest

(adjective)

Nominative, neuter, singular of uttama

uttama - highest, best, excellent, supreme

Superlative of 'ud' (up).

तम् (tam) - Refers to 'kevalībhāvam'. (that)

(pronoun)

Accusative, masculine, singular of tad

tad - that, it

विद्धि (viddhi) - know, understand

(verb)

2nd person , singular, active, imperative (lot) of vid

Root: vid (class 2)

केवलीभावम् (kevalībhāvam) - Refers to the state of pure isolation (kevalībhāva). (state of aloneness, pure isolation, absolute state)

(noun)

Accusative, masculine, singular of kevalībhāva

kevalībhāva - state of being isolated/alone/pure, absolute state

Compound of 'kevalī' (feminine form of 'kevala', pure, alone) and 'bhāva' (state, existence).

Compound type : tatpuruṣa (kevalī+bhāva)

• kevalī – alone, pure, isolated (feminine)
  adjective (feminine)
  Feminine form of 'kevala'.
• bhāva – state, existence, nature, feeling
  noun (masculine)
  From root bhū (to be).
  Root: bhū (class 1)

सा (sā) - Refers to 'nirvṛtiḥ'. (that, she)

(pronoun)

Nominative, feminine, singular of tad

tad - that, she

शुभा (śubhā) - auspicious, pure, beautiful

(adjective)

Nominative, feminine, singular of śubha

śubha - auspicious, pure, radiant, beautiful

निर्वृतिः (nirvṛtiḥ) - This term can signify supreme peace or liberation (nirvāṇa). (supreme bliss, peace, cessation, liberation)

(noun)

Nominative, feminine, singular of nirvṛti

nirvṛti - cessation, perfect bliss, peace, liberation (nirvāṇa)

From prefix 'nir-' and root 'vṛt' (to turn, exist).

Prefix: nir

Root: vṛt (class 1)

परा (parā) - supreme, highest, excellent

(adjective)

Nominative, feminine, singular of para

para - supreme, highest, ultimate, excellent