योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-94, verse-64

अवश्यं खलु यन्नास्ति निर्बीजं तन्मतिभ्रमः ।
द्वीन्दुत्वमरुभूम्यम्बुवन्ध्यापुत्रदशासमम् ॥ ६४ ॥

avaśyaṃ khalu yannāsti nirbījaṃ tanmatibhramaḥ ,
dvīndutvamarubhūmyambuvandhyāputradaśāsamam 64

64. avaśyam khalu yat na asti nirbījam tat matibhramaḥ
| dvīndutvam marubhūmyambu vandhyāputradaśāsamam ||

64. khalu avaśyam yat nirbījam na asti,
tat matibhramaḥ dvīndutvam marubhūmyambu vandhyāputradaśāsamam

64. Certainly, that which necessarily does not exist, being without a seed, is a delusion of the mind. It is comparable to the phenomena of seeing two moons, water in a desert mirage, and the impossible state of a barren woman's son.

Words meanings summery:

• अवश्यम् (avaśyam) - certainly, necessarily (certainly, necessarily, inevitably)

• खलु (khalu) - indeed, certainly (indeed, certainly, surely)

• यत् (yat) - that which (which, that (neuter))

• न (na) - not (not, no)

• अस्ति (asti) - does not exist (is, exists)

• निर्बीजम् (nirbījam) - being without a seed (without a seed, seedless)

• तत् (tat) - that (non-existent thing) (that, it)

• मतिभ्रमः (matibhramaḥ) - a delusion of the mind (delusion of mind, error of intellect)

• द्वीन्दुत्वम् (dvīndutvam) - the phenomena of seeing two moons (the state of having two moons, seeing two moons)

• मरुभूम्यम्बु (marubhūmyambu) - water in a desert mirage (desert-land water (mirage water in a desert))

• वन्ध्यापुत्रदशासमम् (vandhyāputradaśāsamam) - the impossible state of a barren woman's son (similar to the state of a barren woman's son)

Words meanings and morphology

अवश्यम् (avaśyam) - certainly, necessarily (certainly, necessarily, inevitably)

(indeclinable)

Gerundive

Negation of vaśya (dependent, obedient), so 'independent, not to be avoided'.

Prefix: a

Root: vaś (class 2)

Note: Adverbial usage of neuter nominative/accusative singular.

खलु (khalu) - indeed, certainly (indeed, certainly, surely)

(indeclinable)

Emphatic particle.

यत् (yat) - that which (which, that (neuter))

(pronoun)

Nominative, neuter, singular of yad

yad - which, who, what

न (na) - not (not, no)

(indeclinable)

अस्ति (asti) - does not exist (is, exists)

(verb)

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

From root as (to be).

Root: as (class 2)

निर्बीजम् (nirbījam) - being without a seed (without a seed, seedless)

(adjective)

Nominative, neuter, singular of nirbīja

nirbīja - seedless, without origin, groundless

Compound formed with 'nir' (without) and 'bīja' (seed).

Compound type : bahuvrihi (nis+bīja)

• nis – out, forth, without, negation
  indeclinable
  Prefix/indeclinable
• bīja – seed, origin, cause
  noun (neuter)

तत् (tat) - that (non-existent thing) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

मतिभ्रमः (matibhramaḥ) - a delusion of the mind (delusion of mind, error of intellect)

(noun)

Nominative, masculine, singular of matibhrama

matibhrama - mental error, delusion, confusion of mind, illusion of intellect

Compound type : tatpurusha (mati+bhrama)

• mati – mind, intellect, thought, opinion
  noun (feminine)
  Root: man (class 4)
• bhrama – wandering, error, delusion, illusion
  noun (masculine)
  From root bhram (to wander, to err)
  Root: bhram (class 1)

द्वीन्दुत्वम् (dvīndutvam) - the phenomena of seeing two moons (the state of having two moons, seeing two moons)

(noun)

Nominative, neuter, singular of dvīndutva

dvīndutva - the state of being two moons, duality of the moon (an optical illusion)

From dvīndu (two moons) + tva (suffix for abstract noun).

Compound type : tatpurusha (dvi+indu+tva)

• dvi – two
  numeral
• indu – moon, drop
  noun (masculine)
• tva – suffix forming abstract nouns, -ness, -hood
  suffix (neuter)

मरुभूम्यम्बु (marubhūmyambu) - water in a desert mirage (desert-land water (mirage water in a desert))

(noun)

Nominative, neuter, singular of marubhūmyambu

marubhūmyambu - water of a desert land, mirage water

Compound type : tatpurusha (marubhūmi+ambu)

• marubhūmi – desert land, desert
  noun (feminine)
• ambu – water
  noun (neuter)

Note: A long compound (shashṭhī tatpuruṣa followed by another shashṭhī tatpuruṣa or similar structure).

वन्ध्यापुत्रदशासमम् (vandhyāputradaśāsamam) - the impossible state of a barren woman's son (similar to the state of a barren woman's son)

(adjective)

Nominative, neuter, singular of vandhyāputradaśāsama

vandhyāputradaśāsama - similar to the state of a barren woman's son (an impossibility)

Compound type : tatpurusha (vandhyāputra+daśā+sama)

• vandhyāputra – son of a barren woman
  noun (masculine)
• daśā – state, condition, plight, period
  noun (feminine)
• sama – equal, similar, like
  adjective (masculine)

Note: This adjective qualifies the implicit 'delusion' by similarity with these impossible states.