योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-206, verse-18

अन्ये वा हेतवः के स्युः कथं द्रव्यादिसंभवः ।
परलोकोऽस्य नास्तीति यथासंवेदनं स्थितेः ॥ १८ ॥

anye vā hetavaḥ ke syuḥ kathaṃ dravyādisaṃbhavaḥ ,
paraloko'sya nāstīti yathāsaṃvedanaṃ sthiteḥ 18

18. anye vā hetavaḥ ke syuḥ katham dravyādisaṃbhavaḥ
paralokaḥ asya na asti iti yathāsaṃvedanam sthiteḥ

18. asya paralokaḥ na asti iti yathāsaṃvedanam sthiteḥ
vā anye ke hetavaḥ syuḥ katham dravyādisaṃbhavaḥ

18. Otherwise, what other causes could there be? How could substances and so on originate? This is because, from the established fact (sthiti) that, according to direct perception, an afterlife (paraloka) does not exist for this [being/person].

Words meanings summery:

• अन्ये (anye) - other (other, another, different)

• वा (vā) - or, otherwise (or, either, like, as if)

• हेतवः (hetavaḥ) - causes (causes, reasons, motives)

• के (ke) - what (who, what, which)

• स्युः (syuḥ) - would be, could be (they would be, they might be)

• कथम् (katham) - how (how, in what manner, why)

• द्रव्यादिसंभवः (dravyādisaṁbhavaḥ) - the origin of substances and so on (the origin/existence of substances etc.)

• परलोकः (paralokaḥ) - an afterlife (paraloka) (other world, next world, afterlife)

• अस्य (asya) - for this [being/person] (of this, for this, his)

• न (na) - not (not, no, nor)

• अस्ति (asti) - exists (is, exists)

• इति (iti) - thus, [because it is established] that (thus, in this manner, marking quotation)

• यथासंवेदनम् (yathāsaṁvedanam) - according to direct perception (according to perception, as perceived)

• स्थितेः (sthiteḥ) - from the established fact (sthiti) (from the state, from the established condition, from the existence)

Words meanings and morphology

अन्ये (anye) - other (other, another, different)

(pronoun)

Nominative, masculine, plural of anya

anya - other, another, different, distinct

वा (vā) - or, otherwise (or, either, like, as if)

(indeclinable)

हेतवः (hetavaḥ) - causes (causes, reasons, motives)

(noun)

Nominative, masculine, plural of hetu

hetu - cause, reason, motive, instrument

के (ke) - what (who, what, which)

(pronoun)

Nominative, masculine, plural of kim

kim - who, what, which, why, how

स्युः (syuḥ) - would be, could be (they would be, they might be)

(verb)

3rd person , plural, active, optative (vidhi liṅ) of as

Optative mood, 3rd person plural

Root 'as' (2nd class), optative, parasmaipada.

Root: as (class 2)

कथम् (katham) - how (how, in what manner, why)

(indeclinable)

द्रव्यादिसंभवः (dravyādisaṁbhavaḥ) - the origin of substances and so on (the origin/existence of substances etc.)

(noun)

Nominative, masculine, singular of dravyādisaṃbhava

dravyādisaṁbhava - origin/existence of substances etc.

Compound type : tatpuruṣa (dravya+ādi+saṃbhava)

• dravya – substance, object, thing, wealth
  noun (neuter)
  Root: dru (class 1)
• ādi – beginning, et cetera, and so on
  indeclinable
• saṃbhava – origin, birth, production, possibility
  noun (masculine)
  derived from 'bhū' with prefix 'sam'
  From root 'bhū' (to be, become) with prefix 'sam-'.
  Prefix: sam
  Root: bhū (class 1)

परलोकः (paralokaḥ) - an afterlife (paraloka) (other world, next world, afterlife)

(noun)

Nominative, masculine, singular of paraloka

paraloka - other world, next world, future world, afterlife

Compound type : tatpuruṣa (para+loka)

• para – other, another, supreme, distant
  adjective (masculine/feminine/neuter)
• loka – world, realm, people, common practice
  noun (masculine)
  Root: lok (class 10)

अस्य (asya) - for this [being/person] (of this, for this, his)

(pronoun)

Genitive, masculine/neuter, singular of idam

idam - this, he, she, it

Note: Refers to the current being/person.

न (na) - not (not, no, nor)

(indeclinable)

अस्ति (asti) - exists (is, exists)

(verb)

3rd person , singular, active, present (laṭ) of as

Present tense, 3rd person singular

Root 'as' (2nd class), present indicative, parasmaipada.

Root: as (class 2)

इति (iti) - thus, [because it is established] that (thus, in this manner, marking quotation)

(indeclinable)

यथासंवेदनम् (yathāsaṁvedanam) - according to direct perception (according to perception, as perceived)

(indeclinable)

Compound type : avyayībhāva (yathā+saṃvedana)

• yathā – as, just as, according to
  indeclinable
• saṃvedana – perception, sensation, consciousness, knowledge
  noun (neuter)
  verbal noun from 'saṃ-vid'
  From root 'vid' (to know) with prefix 'sam-'.
  Prefix: sam
  Root: vid (class 6)

Note: Used adverbially.

स्थितेः (sthiteḥ) - from the established fact (sthiti) (from the state, from the established condition, from the existence)

(noun)

feminine, singular of sthiti

sthiti - standing, state, condition, existence, established rule

verbal noun from 'sthā'

From root 'sthā' (to stand).

Root: sthā (class 1)

Note: In this context, best interpreted as ablative, meaning 'due to the fact that it is established'.