योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-119, verse-15

सद्वा भवत्वसद्वापि सुरूढं हृदये हि यत् ।
तत्तदर्थक्रियाकारि विषस्येवामृतक्रिया ॥ १५ ॥

sadvā bhavatvasadvāpi surūḍhaṃ hṛdaye hi yat ,
tattadarthakriyākāri viṣasyevāmṛtakriyā 15

15. sat vā bhavatu asat vā api su-rūḍham hṛdaye hi yat
tat tat artha-kriyā-kāri viṣasya iva amṛta-kriyā

15. yat hṛdaye su-rūḍham hi sat vā bhavatu asat vā api
tat tat artha-kriyā-kāri viṣasya amṛta-kriyā iva

15. Whether it be real or unreal, that which is firmly established in the heart indeed produces its corresponding effect, just as [a perception of] poison can lead to the effect of nectar.

Words meanings summery:

• सत् (sat) - real, existing, true, good, being

• वा (vā) - or, either...or

• भवतु (bhavatu) - let it be, may it be, it should be

• असत् (asat) - unreal, non-existent, false, bad

• वा (vā) - or, either...or

• अपि (api) - also, even, too

• सु-रूढम् (su-rūḍham) - deeply ingrained in one's belief or perception (firmly rooted, well established)

• हृदये (hṛdaye) - in one's inner consciousness or conviction (in the heart, in the mind)

• हि (hi) - Emphasizes the certainty of the statement. (indeed, certainly, because, for)

• यत् (yat) - which, whatever

• तत् (tat) - refers to 'whatever is deeply rooted in the heart' (that, it)

• तत् (tat) - its specific, corresponding (that, it, its own)

• अर्थ-क्रिया-कारि (artha-kriyā-kāri) - produces its specific, appropriate effect (causing a practical effect, having a purpose, effective)

• विषस्य (viṣasya) - of poison, belonging to poison

• इव (iva) - like, as, as it were

• अमृत-क्रिया (amṛta-kriyā) - a life-giving or healing effect, contrary to the nature of poison (the action/effect of nectar)

Words meanings and morphology

सत् (sat) - real, existing, true, good, being

(adjective)

Nominative, neuter, singular of sat

sat - existing, real, good, true, being (present participle of `as`)

Present Active Participle

Nominative singular neuter, from root `as` (to be).

Root: as (class 2)

वा (vā) - or, either...or

(indeclinable)

Particle

भवतु (bhavatu) - let it be, may it be, it should be

(verb)

3rd person , singular, active, imperative (loṭ) of bhū

Imperative active

3rd person singular, parasmaipada.

Root: bhū (class 1)

असत् (asat) - unreal, non-existent, false, bad

(adjective)

Nominative, neuter, singular of asat

asat - non-existent, unreal, false, bad (present participle of `as` with negative `a`)

Present Active Participle

Nominative singular neuter, from root `as` (to be) with negative prefix `a-`.

Compound type : nañ-tatpuruṣa (a+sat)

• a – not, non-, un-
  indeclinable
  Negative prefix
• sat – existing, real
  adjective (neuter)
  Present Active Participle
  From root `as`
  Root: as (class 2)

वा (vā) - or, either...or

(indeclinable)

Particle

अपि (api) - also, even, too

(indeclinable)

Particle

सु-रूढम् (su-rūḍham) - deeply ingrained in one's belief or perception (firmly rooted, well established)

(adjective)

Nominative, neuter, singular of su-rūḍha

su-rūḍha - firmly rooted, well established, grown well

Past Passive Participle with prefix

Nominative singular neuter. From root `ruh` (to grow/ascend) with prefix `su-` (good/well), form `rūḍha`.

Compound type : prādi-samāsa (su+rūḍha)

• su – good, well, excellent
  indeclinable
  Prefix
• rūḍha – grown, ascended, established, traditional
  adjective (neuter)
  Past Passive Participle
  From root `ruh` (to grow)
  Root: ruh (class 1)

हृदये (hṛdaye) - in one's inner consciousness or conviction (in the heart, in the mind)

(noun)

Locative, neuter, singular of hṛdaya

hṛdaya - heart, mind, core, essence

Locative singular.

हि (hi) - Emphasizes the certainty of the statement. (indeed, certainly, because, for)

(indeclinable)

Particle

यत् (yat) - which, whatever

(pronoun)

Nominative, neuter, singular of yad

yad - which, what, whatever, that

Neuter nominative singular, relative pronoun.

तत् (tat) - refers to 'whatever is deeply rooted in the heart' (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, it, he, she

Neuter nominative singular, correlative pronoun.

तत् (tat) - its specific, corresponding (that, it, its own)

(pronoun)

Nominative, neuter, singular of tad

tad - that, it, his, her, its

Neuter nominative singular (or adjectival for 'its own').

अर्थ-क्रिया-कारि (artha-kriyā-kāri) - produces its specific, appropriate effect (causing a practical effect, having a purpose, effective)

(adjective)

Nominative, neuter, singular of artha-kriyā-kārin

artha-kriyā-kārin - causing a practical effect, effective, having a purpose, producing an object or action

Compound adjective, nominative singular neuter, from `artha-kriyā` (practical action/effect) and `kārin` (maker/doer).

Compound type : tatpuruṣa (artha+kriyā+kārin)

• artha – purpose, meaning, object, wealth
  noun (masculine)
• kriyā – action, activity, effect, ritual
  noun (feminine)
  From root `kṛ` (to do)
  Root: kṛ (class 8)
• kārin – maker, doer, causing, effecting
  adjective (masculine)
  Agent noun/adjective
  Suffix `-in` from root `kṛ` (to do)
  Root: kṛ (class 8)

Note: Qualifies `tat`.

विषस्य (viṣasya) - of poison, belonging to poison

(noun)

Genitive, neuter, singular of viṣa

viṣa - poison, venom

Genitive singular.

इव (iva) - like, as, as it were

(indeclinable)

Particle expressing comparison

अमृत-क्रिया (amṛta-kriyā) - a life-giving or healing effect, contrary to the nature of poison (the action/effect of nectar)

(noun)

Nominative, feminine, singular of amṛta-kriyā

amṛta-kriyā - the action/effect of nectar, a life-giving or immortalizing action

Compound noun, nominative singular feminine.

Compound type : ṣaṣṭhī-tatpuruṣa (amṛta+kriyā)

• amṛta – nectar, immortality, immortal, divine
  noun (neuter)
  From `a-mṛta` (not dead), root `mṛ` (to die)
  Prefix: a
  Root: mṛ (class 1)
• kriyā – action, activity, effect, ritual
  noun (feminine)
  From root `kṛ` (to do)
  Root: kṛ (class 8)