योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-79, verse-23

अप्रमाणतयैतस्मिन्नर्थे तेषां महामते ।
अन्यत्राणि प्रमाणत्वं वन्ध्यादावपि किं भवेत् ॥ २३ ॥

apramāṇatayaitasminnarthe teṣāṃ mahāmate ,
anyatrāṇi pramāṇatvaṃ vandhyādāvapi kiṃ bhavet 23

23. apramāṇatayā etasmin arthe teṣām mahāmate
anyatra api pramāṇatvam vandhyādau api kim bhavet

23. mahāmate teṣām etasmin arthe apramāṇatayā
anyatra api pramāṇatvam kim bhavet api vandhyādau

23. O great-minded one, if those scriptures are considered to lack authority (apramāṇatā) concerning this matter [of universal dissolution], then how could they possibly possess validity (pramāṇatvam) in any other context? Would their authority extend even to absurdities, such as a barren woman giving birth?

Words meanings summery:

• अप्रमाणतया (apramāṇatayā) - due to their lack of authority (by reason of invalidity, due to non-authoritativeness)

• एतस्मिन् (etasmin) - concerning this (in this, on this)

• अर्थे (arthe) - concerning this matter (of universal dissolution) (in the matter, in the purpose, in the meaning)

• तेषाम् (teṣām) - of those (scriptures mentioned in the previous verse) (of them, of those)

• महामते (mahāmate) - O great-minded one! (addressing the opponent) (O great-minded one!)

• अन्यत्र (anyatra) - in any other context/matter (elsewhere, in another place/matter)

• अपि (api) - even (also, even, too)

• प्रमाणत्वम् (pramāṇatvam) - validity (authoritativeness, validity, proof-ness)

• वन्ध्यादौ (vandhyādau) - in absurdities, such as a barren woman giving birth (in a barren woman etc., in the matter of the sterile)

• अपि (api) - even (also, even, too)

• किम् (kim) - would it (interrogative for doubt/impossibility) (what?, whether?, interrogative particle)

• भवेत् (bhavet) - could possibly be, would apply (may be, should be, would be)

Words meanings and morphology

अप्रमाणतया (apramāṇatayā) - due to their lack of authority (by reason of invalidity, due to non-authoritativeness)

(noun)

Instrumental, feminine, singular of apramāṇatā

apramāṇatā - invalidity, non-authoritativeness, lack of proof

From a-pramāṇa (not an authority) + suffix -tā (abstract noun).

Compound type : nañ-tatpuruṣa (a+pramāṇa+tā)

• a – not, un-
  indeclinable
  Negative prefix.
• pramāṇa – authority, valid knowledge, means of knowledge, proof
  noun (neuter)
  From pra + root mā (to measure, to know).
  Prefix: pra
  Root: mā (class 2)
• tā – suffix forming abstract nouns
  suffix (feminine)
  Feminine abstract noun suffix.

Note: Denotes "by means of" or "due to".

एतस्मिन् (etasmin) - concerning this (in this, on this)

(pronoun)

Locative, neuter, singular of etad

etad - this

Demonstrative pronoun.

अर्थे (arthe) - concerning this matter (of universal dissolution) (in the matter, in the purpose, in the meaning)

(noun)

Locative, masculine, singular of artha

artha - meaning, purpose, object, matter, wealth

Root: ṛ (class 1)

तेषाम् (teṣām) - of those (scriptures mentioned in the previous verse) (of them, of those)

(pronoun)

Genitive, masculine, plural of tad

tad - that, this, it

Demonstrative pronoun.

महामते (mahāmate) - O great-minded one! (addressing the opponent) (O great-minded one!)

(adjective)

Vocative, masculine, singular of mahāmat

mahāmat - great-minded, intelligent, sagacious

Bahuvrīhi compound: mahā (great) + mati (mind).

Compound type : bahuvrīhi (mahā+mati)

• mahā – great, large, mighty
  adjective (feminine)
  Feminine form of mahat.
• mati – mind, intelligence, thought, opinion
  noun (feminine)
  From root man (to think).
  Root: man (class 4)

Note: Term of address.

अन्यत्र (anyatra) - in any other context/matter (elsewhere, in another place/matter)

(indeclinable)

From anya (other) + suffix -tra (denoting place).

अपि (api) - even (also, even, too)

(indeclinable)

प्रमाणत्वम् (pramāṇatvam) - validity (authoritativeness, validity, proof-ness)

(noun)

Nominative, neuter, singular of pramāṇatva

pramāṇatva - authoritativeness, validity, the state of being a valid means of knowledge

From pramāṇa (authority) + suffix -tva (abstract noun).

Note: Subject of bhavet.

वन्ध्यादौ (vandhyādau) - in absurdities, such as a barren woman giving birth (in a barren woman etc., in the matter of the sterile)

(noun)

Locative, masculine, singular of vandhyādi

vandhyādi - beginning with a barren woman, barren woman and so forth

Compound.

Compound type : tatpurusha (vandhyā+ādi)

• vandhyā – barren woman, sterile
  noun (feminine)
  From root vandh (to bind, to be barren).
  Root: vandh (class 1)
• ādi – beginning, commencement, first, etcetera
  noun (masculine)

Note: Denotes "in the case of" or "concerning".

अपि (api) - even (also, even, too)

(indeclinable)

किम् (kim) - would it (interrogative for doubt/impossibility) (what?, whether?, interrogative particle)

(indeclinable)

Interrogative pronoun/particle.

भवेत् (bhavet) - could possibly be, would apply (may be, should be, would be)

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of bhū

Optative active 3rd person singular

From root bhū.

Root: bhū (class 1)