योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-39, verse-7

असद्रूपोपलम्भानामियं वस्तुस्वभावता ।
यत्स्वर्गवेदनं स्वप्नवन्ध्यापुत्रोपलम्भवत् ॥ ७ ॥

asadrūpopalambhānāmiyaṃ vastusvabhāvatā ,
yatsvargavedanaṃ svapnavandhyāputropalambhavat 7

7. asadrūpopalambhānām iyam vastusvabhāvatā yat
svargavedanam svapnavandhyāputropalambhavat

7. iyam vastusvabhāvatā asadrūpopalambhānām yat
svargavedanam svapnavandhyāputropalambhavat

7. This is the intrinsic nature (vastusvabhāvatā) of perceptions of unreal forms, that the experience of heaven is like the perception of a dream or the son of a barren woman.

Words meanings summery:

• असद्रूपोपलम्भानाम् (asadrūpopalambhānām) - of the perceptions of unreal forms; of those whose perception is of non-existent forms

• इयम् (iyam) - this (feminine singular)

• वस्तुस्वभावता (vastusvabhāvatā) - the intrinsic nature of things; the inherent nature of reality

• यत् (yat) - that, which, because

• स्वर्गवेदनम् (svargavedanam) - the perception of heaven; the experience of heaven

• स्वप्नवन्ध्यापुत्रोपलम्भवत् (svapnavandhyāputropalambhavat) - like the perception of a dream or the son of a barren woman

Words meanings and morphology

असद्रूपोपलम्भानाम् (asadrūpopalambhānām) - of the perceptions of unreal forms; of those whose perception is of non-existent forms

(noun)

Genitive, neuter, plural of asadrūpopalambha

asadrūpopalambha - perception of unreal forms

Compound type : tatpuruṣa (asat+rūpa+upalambha)

• asat – non-existent, unreal, untrue
  adjective (neuter)
• rūpa – form, shape, appearance, nature
  noun (neuter)
• upalambha – perception, apprehension, acquisition
  noun (masculine)
  Prefix: upa
  Root: labh (class 1)

इयम् (iyam) - this (feminine singular)

(pronoun)

Nominative, feminine, singular of idam

idam - this

वस्तुस्वभावता (vastusvabhāvatā) - the intrinsic nature of things; the inherent nature of reality

(noun)

Nominative, feminine, singular of vastusvabhāvatā

vastusvabhāvatā - intrinsic nature of things, inherent nature of reality

Compound type : tatpuruṣa (vastu+svabhāva+tā)

• vastu – thing, object, reality, substance
  noun (neuter)
• svabhāva – own nature, inherent quality, intrinsic disposition
  noun (masculine)
• tā – suffix for abstract noun, -ness, -hood
  indeclinable
  Suffix forming feminine abstract nouns from adjectives or nouns.

यत् (yat) - that, which, because

(indeclinable)

Note: Used as a conjunction here.

स्वर्गवेदनम् (svargavedanam) - the perception of heaven; the experience of heaven

(noun)

Nominative, neuter, singular of svargavedana

svargavedana - perception of heaven, experience of heaven

Compound type : tatpuruṣa (svarga+vedana)

• svarga – heaven, paradise, celestial abode
  noun (masculine)
• vedana – experience, feeling, sensation, perception, knowledge
  noun (feminine)
  Derived from root 'vid' (to know, perceive)
  Root: vid (class 6)

स्वप्नवन्ध्यापुत्रोपलम्भवत् (svapnavandhyāputropalambhavat) - like the perception of a dream or the son of a barren woman

(indeclinable)

Compound type : bahuvrīhi / tatpuruṣa with vat suffix (svapna+vandhyāputra+upalambha+vat)

• svapna – dream, sleep
  noun (masculine)
• vandhyāputra – son of a barren woman (an impossibility)
  noun (masculine)
• upalambha – perception, apprehension
  noun (masculine)
  Prefix: upa
  Root: labh (class 1)
• vat – like, as if, similar to
  indeclinable
  Suffix forming adverbs or adjectives indicating similarity.