महाभारतः mahābhārataḥ - book-12, chapter-262, verse-42

एषैव निष्ठा सर्वस्य यद्यदस्ति च नास्ति च ।
एतदन्तं च मध्यं च सच्चासच्च विजानतः ॥४२॥

42. eṣaiva niṣṭhā sarvasya yadyadasti ca nāsti ca ,
etadantaṁ ca madhyaṁ ca saccāsacca vijānataḥ.

42. eṣā eva niṣṭhā sarvasya yat yat asti ca na asti ca
etat antam ca madhyam ca sat ca asat ca vijānataḥ

42. eṣā eva sarvasya yat yat asti ca na asti ca niṣṭhā
vijānataḥ etat antam ca madhyam ca sat ca asat ca

42. This is indeed the ultimate foundation (niṣṭhā) for all that exists and all that does not exist. For one who discerns both reality (sat) and unreality (asat), this (principle) is the end and the middle of everything.

Words meanings summery:

• एषा (eṣā) - this (referring to niṣṭhā or the Veda's essence) (this (feminine))

• एव (eva) - indeed, certainly (only, just, indeed, certainly)

• निष्ठा (niṣṭhā) - the ultimate foundation (niṣṭhā) (foundation, basis, steadfastness, end, conclusion, ultimate truth)

• सर्वस्य (sarvasya) - of everything (of all, of everything)

• यत् (yat) - whatever (what, which, that)

• यत् (yat) - whatever (what, which, that)

• अस्ति (asti) - exists (is, exists)

• च (ca) - and (and, also)

• न (na) - not (not, no)

• अस्ति (asti) - exists (is, exists)

• च (ca) - and (and, also)

• एतत् (etat) - this (principle/Veda) (this, this one)

• अन्तम् (antam) - the end (end, limit, conclusion)

• च (ca) - and (and, also)

• मध्यम् (madhyam) - the middle (middle, center, intermediate)

• च (ca) - and (and, also)

• सत् (sat) - reality, being (being, existing, true, real, good)

• च (ca) - and (and, also)

• असत् (asat) - unreality, non-being (non-being, non-existent, untrue, unreal, bad)

• च (ca) - and (and, also)

• विजानतः (vijānataḥ) - for one who discerns (of one who knows, of one who understands)

Words meanings and morphology

एषा (eṣā) - this (referring to niṣṭhā or the Veda's essence) (this (feminine))

(pronoun)

Nominative, feminine, singular of etad

etad - this, this one

Demonstrative pronoun

एव (eva) - indeed, certainly (only, just, indeed, certainly)

(indeclinable)

Emphatic particle

निष्ठा (niṣṭhā) - the ultimate foundation (niṣṭhā) (foundation, basis, steadfastness, end, conclusion, ultimate truth)

(noun)

Nominative, feminine, singular of niṣṭhā

niṣṭhā - foundation, basis, steadfastness, end, conclusion, ultimate truth, faith

From root 'sthā' with prefix 'ni'

Prefix: ni

Root: sthā (class 1)

सर्वस्य (sarvasya) - of everything (of all, of everything)

(pronoun)

Genitive, neuter, singular of sarva

sarva - all, every, whole, complete

यत् (yat) - whatever (what, which, that)

(pronoun)

Nominative, neuter, singular of yad

yad - what, which, that, who

Relative pronoun

यत् (yat) - whatever (what, which, that)

(pronoun)

Nominative, neuter, singular of yad

yad - what, which, that, who

Relative pronoun

Note: Repetition emphasizes 'whatever'

अस्ति (asti) - exists (is, exists)

(verb)

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

Present indicative, 3rd singular

Root: as (class 2)

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

न (na) - not (not, no)

(indeclinable)

Negative particle

अस्ति (asti) - exists (is, exists)

(verb)

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

Present indicative, 3rd singular

Root: as (class 2)

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

एतत् (etat) - this (principle/Veda) (this, this one)

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one

Demonstrative pronoun

अन्तम् (antam) - the end (end, limit, conclusion)

(noun)

Nominative, neuter, singular of anta

anta - end, limit, boundary, conclusion, death

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

मध्यम् (madhyam) - the middle (middle, center, intermediate)

(noun)

Nominative, neuter, singular of madhya

madhya - middle, central, intermediate, in the midst of

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

सत् (sat) - reality, being (being, existing, true, real, good)

(noun)

Nominative, neuter, singular of sat

sat - being, existing, true, real, good, virtuous

Present Active Participle

From root 'as' (to be)

Root: as (class 2)

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

असत् (asat) - unreality, non-being (non-being, non-existent, untrue, unreal, bad)

(noun)

Nominative, neuter, singular of asat

asat - non-being, non-existent, untrue, unreal, bad, evil

Present Active Participle

Negative prefix 'a' + 'sat' (from root 'as')

Compound type : nañ-tatpuruṣa (a+sat)

• a – not, non-, un-
  indeclinable
  Negative particle
• sat – being, existing, real, true
  adjective (masculine)
  Present Active Participle
  From root 'as' (to be)
  Root: as (class 2)

च (ca) - and (and, also)

(indeclinable)

Note: Postpositive conjunction

विजानतः (vijānataḥ) - for one who discerns (of one who knows, of one who understands)

(adjective)

Genitive, masculine, singular of vijānat

vijānat - knowing, understanding, discerning

Present Active Participle

From root 'jñā' with prefix 'vi'

Prefix: vi

Root: jñā (class 9)

Note: Used substantively, "of the knowing one"