योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-81, verse-100

संधिरप्यविलोपः स्यादेतयोरेव तद्वपुः ।
भावाभावैर्यथैकास्थानिष्ठावेतौ तथैव हि ॥ १०० ॥

saṃdhirapyavilopaḥ syādetayoreva tadvapuḥ ,
bhāvābhāvairyathaikāsthāniṣṭhāvetau tathaiva hi 100

100. sandhiḥ api avilopaḥ syāt etayoḥ eva tat vapuḥ
bhāva-abhāvaiḥ yathā eka-asthā aniṣṭhau etau tathā eva hi

100. etayoḥ sandhiḥ api avilopaḥ syāt tat eva hi vapuḥ yathā
etau bhāva-abhāvaiḥ eka-asthā tathā eva hi aniṣṭhau

100. The intrinsic connection (sandhi) of these two (principles) is also indestructible; indeed, that is their very essence. Just as these two are indivisibly established through their presence and absence, so too are they ultimately imperishable.

Words meanings summery:

• सन्धिः (sandhiḥ) - intrinsic connection or union between the two principles (connection, union, junction, euphonic combination)

• अपि (api) - also, even, too, moreover

• अविलोपः (avilopaḥ) - non-disappearing, indestructible, imperishable

• स्यात् (syāt) - would be, might be, should be

• एतयोः (etayoḥ) - of these two principles (consciousness and inertness, implied from context) (of these two)

• एव (eva) - indeed, only, just, exactly

• तत् (tat) - that (refers to the connection/sandhi) (that, it)

• वपुः (vapuḥ) - their very essence or nature (form, body, essence, nature)

• भाव-अभावैः (bhāva-abhāvaiḥ) - by existence and non-existence, by presence and absence, by manifestation and non-manifestation

• यथा (yathā) - just as, as, like

• एक-अस्था (eka-asthā) - established in a single, inseparable state (in one state, in a single place/foundation, indivisibly established)

• अनिष्ठौ (aniṣṭhau) - ultimately imperishable (without termination, imperishable, non-ending)

• एतौ (etau) - these two principles (consciousness and inertness, implied from context) (these two)

• तथा (tathā) - so, thus, in that manner

• एव (eva) - indeed, only, just, exactly

• हि (hi) - indeed, surely, for, because

Words meanings and morphology

सन्धिः (sandhiḥ) - intrinsic connection or union between the two principles (connection, union, junction, euphonic combination)

(noun)

Nominative, masculine, singular of sandhi

sandhi - union, junction, connection, peace; euphonic combination of sounds

From sam-dhā

Prefix: sam

Root: dhā (class 3)

अपि (api) - also, even, too, moreover

(indeclinable)

अविलोपः (avilopaḥ) - non-disappearing, indestructible, imperishable

(adjective)

Nominative, masculine, singular of avilopa

avilopa - not disappearing, indestructible, imperishable

Negative compound of vilopa

Compound type : nañ-tatpuruṣa (a+vilopa)

• a – not, non-, un-
  indeclinable
  Negative prefix
• vilopa – disappearance, loss, destruction
  noun (masculine)
  From vi-lup
  Prefix: vi
  Root: lup (class 6)

Note: Agrees with sandhiḥ

स्यात् (syāt) - would be, might be, should be

(verb)

3rd person , singular, active, optative (liṅ) of as

Root: as (class 2)

एतयोः (etayoḥ) - of these two principles (consciousness and inertness, implied from context) (of these two)

(pronoun)

Genitive, dual of etas

etas - this (dual form of idam in specific cases)

Dual genitive/locative of idam

एव (eva) - indeed, only, just, exactly

(indeclinable)

Note: Emphatic particle

तत् (tat) - that (refers to the connection/sandhi) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, it

वपुः (vapuḥ) - their very essence or nature (form, body, essence, nature)

(noun)

Nominative, neuter, singular of vapus

vapus - body, form, figure, essence, nature

Root: vap (class 1)

भाव-अभावैः (bhāva-abhāvaiḥ) - by existence and non-existence, by presence and absence, by manifestation and non-manifestation

(noun)

Instrumental, masculine, plural of bhāva-abhāva

bhāva-abhāva - existence and non-existence, presence and absence

Dvandva compound

Compound type : dvandva (bhāva+abhāva)

• bhāva – existence, being, state, feeling, presence, manifestation
  noun (masculine)
  From bhū
  Root: bhū (class 1)
• abhāva – non-existence, absence, negation, non-manifestation
  noun (masculine)
  Negative compound of bhāva

यथा (yathā) - just as, as, like

(indeclinable)

एक-अस्था (eka-asthā) - established in a single, inseparable state (in one state, in a single place/foundation, indivisibly established)

(adjective)

Nominative, feminine, singular of eka-astha

eka-astha - standing in one place, residing in one place, having a single state

Compound type : bahuvrīhi (eka+astha)

• eka – one, single
  numeral (masculine)
• astha – standing, abiding, situated
  adjective (masculine)
  From root sthā with 'a' suffix
  Root: sthā (class 1)

Note: Predicative adjective agreeing with an implied feminine noun referring to state/basis, or implicitly agreeing with the dual masculine etau in a less strict sense.

अनिष्ठौ (aniṣṭhau) - ultimately imperishable (without termination, imperishable, non-ending)

(adjective)

Nominative, masculine, dual of aniṣṭha

aniṣṭha - having no end, imperishable, without termination; not desired, unwelcome

Negative compound of niṣṭha (from ni-sthā)

Compound type : nañ-tatpuruṣa (a+niṣṭha)

• a – not, non-, un-
  indeclinable
  Negative prefix
• niṣṭha – standing on, devoted to, ending, completion
  adjective (masculine)
  From ni-sthā
  Prefix: ni
  Root: sthā (class 1)

Note: Agrees with etau

एतौ (etau) - these two principles (consciousness and inertness, implied from context) (these two)

(pronoun)

Nominative, masculine, dual of etas

etas - this (dual form of idam in specific cases)

Dual nominative of idam

तथा (tathā) - so, thus, in that manner

(indeclinable)

Note: Corresponds to yathā

एव (eva) - indeed, only, just, exactly

(indeclinable)

Note: Emphatic particle

हि (hi) - indeed, surely, for, because

(indeclinable)

Note: Emphatic particle