योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-96, verse-18

भावनामनुसंधानं यदा निश्चित्य संस्थिता ।
तदैषा प्रोच्यते बुद्धिरियत्ताग्रहणक्षमा ॥ १८ ॥

bhāvanāmanusaṃdhānaṃ yadā niścitya saṃsthitā ,
tadaiṣā procyate buddhiriyattāgrahaṇakṣamā 18

18. bhāvanām anusandhānam yadā niścitya saṃsthitā
tadā eva eṣā procyate buddhiḥ iyattāgrahaṇakṣamā

18. yadā bhāvanām anusandhānam niścitya saṃsthitā
tadā eva eṣā iyattāgrahaṇakṣamā buddhiḥ procyate

18. When [consciousness], having firmly settled down (saṃsthitā) by discerning (niścitya) a conception (bhāvanā) and an investigation (anusandhāna), then this [state] is called intellect (buddhi), which is capable of grasping definite limitations or measures.

Words meanings summery:

• भावनाम् (bhāvanām) - a conception (a conception, an idea, imagination, notion)

• अनुसन्धानम् (anusandhānam) - an investigation (investigation, reflection, connection)

• यदा (yadā) - when

• निश्चित्य (niścitya) - by discerning (having determined, having ascertained, having decided)

• संस्थिता (saṁsthitā) - firmly settled down (established, fixed, settled)

• तदा (tadā) - then, at that time

• एव (eva) - indeed, only, very

• एषा (eṣā) - this [state] (this (feminine))

• प्रोच्यते (procyate) - is called, is said

• बुद्धिः (buddhiḥ) - intellect, understanding, discernment

• इयत्ताग्रहणक्षमा (iyattāgrahaṇakṣamā) - capable of grasping definite limitations or measures (capable of grasping definite measure/extent/limitedness)

Words meanings and morphology

भावनाम् (bhāvanām) - a conception (a conception, an idea, imagination, notion)

(noun)

Accusative, feminine, singular of bhāvanā

bhāvanā - conception, imagination, notion, thought, meditation, mental production

From root 'bhū' (to be) with causative 'bhāvaya-' + suffix '-anā'

Root: bhū (class 1)

Note: Object of 'niścitya'

अनुसन्धानम् (anusandhānam) - an investigation (investigation, reflection, connection)

(noun)

Accusative, neuter, singular of anusandhāna

anusandhāna - investigation, inquiry, reflection, connection, bringing together

From 'anu-' + 'sam-' + root 'dhā' (to place)

Prefixes: anu+sam

Root: dhā (class 3)

Note: Object of 'niścitya'

यदा (yadā) - when

(indeclinable)

Note: Temporal conjunction

निश्चित्य (niścitya) - by discerning (having determined, having ascertained, having decided)

(indeclinable)

Absolutive/Gerund

From 'nis-' + root 'ci' (to gather, perceive) + suffix '-tvā' (becomes '-tya' after prefix)

Prefix: nis

Root: ci (class 5)

Note: Governs 'bhāvanām' and 'anusandhānam'

संस्थिता (saṁsthitā) - firmly settled down (established, fixed, settled)

(adjective)

Nominative, feminine, singular of saṃsthita

saṁsthita - situated, placed, established, fixed, abiding

Past Passive Participle

From 'sam-' + root 'sthā' (to stand)

Prefix: sam

Root: sthā (class 1)

Note: Qualifies the implied consciousness

तदा (tadā) - then, at that time

(indeclinable)

Note: Temporal adverb

एव (eva) - indeed, only, very

(indeclinable)

Note: Emphatic particle

एषा (eṣā) - this [state] (this (feminine))

(pronoun)

Nominative, feminine, singular of etad

etad - this, these

Note: Refers to the state described, or 'buddhi'

प्रोच्यते (procyate) - is called, is said

(verb)

3rd person , singular, passive, present (laṭ) of vac

present passive third person singular

From 'pra-' + root 'vac' (2nd class), present tense, passive voice

Prefix: pra

Root: vac (class 2)

बुद्धिः (buddhiḥ) - intellect, understanding, discernment

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, discernment, reason

From root 'budh' (to know, perceive)

Root: budh (class 1)

Note: Subject of 'procyate'

इयत्ताग्रहणक्षमा (iyattāgrahaṇakṣamā) - capable of grasping definite limitations or measures (capable of grasping definite measure/extent/limitedness)

(adjective)

Nominative, feminine, singular of iyattāgrahaṇakṣama

iyattāgrahaṇakṣama - capable of grasping measure/extent/limit

Compound of 'iyattā' (definite measure), 'grahaṇa' (grasping), and 'kṣama' (capable)

Compound type : tatpuruṣa (iyattā+grahaṇa+kṣama)

• iyattā – extent, measure, definite quantity, limitedness
  noun (feminine)
  From 'iyat' (so much) + suffix '-tā'
• grahaṇa – grasping, seizing, comprehending, perceiving
  noun (neuter)
  From root 'grah' (to seize)
  Root: grah (class 9)
• kṣama – able, capable, competent
  adjective
  From root 'kṣam' (to be able)
  Root: kṣam (class 1)

Note: Qualifies 'buddhiḥ'