योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-33, verse-6

कार्यकारणयोरेकसारत्वादेकरूपता ।
फलान्तस्यापि बीजादेर्विकारादिह कल्पना ॥ ६ ॥

kāryakāraṇayorekasāratvādekarūpatā ,
phalāntasyāpi bījādervikārādiha kalpanā 6

6. kāryakāraṇayoḥ ekasāratvāt ekarūpatā
phalāntasya api bījādeḥ vikāra ādi iha kalpanā

6. kāryakāraṇayoḥ ekasāratvāt ekarūpatā iha
phalāntasya api bījādeḥ vikāra ādi kalpanā

6. Because of the single essential nature of both cause and effect, there is an identity of form. Here, the idea of various modifications and the like, from the seed to the final fruit, is merely a mental construct.

Words meanings summery:

• कार्यकारणयोः (kāryakāraṇayoḥ) - of cause and effect

• एकसारत्वात् (ekasāratvāt) - because of having one essence, from having a single essential nature

• एकरूपता (ekarūpatā) - oneness of form, identity of nature, homogeneity

• फलान्तस्य (phalāntasya) - of the final fruit, of the ultimate result

• अपि (api) - also, even, too

• बीजादेः (bījādeḥ) - from the seed etc., beginning with the seed

• विकार (vikāra) - change, modification, transformation

• आदि (ādi) - and so on, etc., beginning

• इह (iha) - here, in this world, in this context

• कल्पना (kalpanā) - imagination, mental construction, notion, theory

Words meanings and morphology

कार्यकारणयोः (kāryakāraṇayoḥ) - of cause and effect

(noun)

Genitive, neuter, dual of kāryakāraṇa

kāryakāraṇa - cause and effect

Compound type : dvandva (kārya+kāraṇa)

• kārya – effect, product, what is to be done
  participle (neuter)
  Gerundive
  From root 'kṛ' (to do), gerundive suffix '-ya'
  Root: kṛ (class 8)
• kāraṇa – cause, reason, instrument
  noun (neuter)
  From root 'kṛ' (to do)
  Root: kṛ (class 8)

Note: Also locative dual.

एकसारत्वात् (ekasāratvāt) - because of having one essence, from having a single essential nature

(noun)

Ablative, neuter, singular of ekasāratva

ekasāratva - the state of having one essence, single essential nature

Derived from 'ekasāra' (single essence) + 'tva' (abstract suffix)

Compound type : tatpuruṣa (eka+sāra+tva)

• eka – one, single
  numeral (neuter)
• sāra – essence, core, pith
  noun (masculine)
• tva – suffix forming abstract nouns, -ness, -hood
  suffix (neuter)

एकरूपता (ekarūpatā) - oneness of form, identity of nature, homogeneity

(noun)

Nominative, feminine, singular of ekarūpatā

ekarūpatā - oneness of form, identity of nature

Derived from 'ekarūpa' (one form) + 'tā' (abstract suffix)

Compound type : tatpuruṣa (eka+rūpa+tā)

• eka – one, single
  numeral (neuter)
• rūpa – form, appearance, nature
  noun (neuter)
• tā – suffix forming abstract nouns, -ness, -hood
  suffix (feminine)

फलान्तस्य (phalāntasya) - of the final fruit, of the ultimate result

(noun)

Genitive, masculine, singular of phalānta

phalānta - fruit-end, ultimate fruit

Compound type : tatpuruṣa (phala+anta)

• phala – fruit, result, consequence
  noun (neuter)
• anta – end, boundary, limit
  noun (masculine)

Note: Can be masculine or neuter.

अपि (api) - also, even, too

(indeclinable)

बीजादेः (bījādeḥ) - from the seed etc., beginning with the seed

(noun)

Ablative, masculine, singular of bījādi

bījādi - beginning with seed, seed etc.

Compound type : tatpuruṣa (bīja+ādi)

• bīja – seed, origin, cause
  noun (neuter)
• ādi – beginning, and so on, etc.
  noun (masculine)

Note: Also genitive singular. Context suggests ablative 'from the seed'.

विकार (vikāra) - change, modification, transformation

(noun)

Nominative, masculine, singular of vikāra

vikāra - change, modification, transformation, product

From 'vi-' + root 'kṛ' (to make)

Prefix: vi

Root: kṛ (class 8)

Note: Here it's part of the list 'vikāra ādi', acting as a nominative to 'kalpanā'.

आदि (ādi) - and so on, etc., beginning

(indeclinable)

Note: Could also be accusative. Adverbial sense 'and so forth'.

इह (iha) - here, in this world, in this context

(indeclinable)

कल्पना (kalpanā) - imagination, mental construction, notion, theory

(noun)

Nominative, feminine, singular of kalpanā

kalpanā - imagination, mental creation, notion, arrangement

From root 'kḷp' (to arrange, to imagine)

Root: kḷp (class 1)