महाभारतः mahābhārataḥ - book-12, chapter-303, verse-12

अव्यक्तैकत्वमित्याहुर्नानात्वं पुरुषस्तथा ।
सर्वभूतदयावन्तः केवलं ज्ञानमास्थिताः ॥१२॥

12. avyaktaikatvamityāhurnānātvaṁ puruṣastathā ,
sarvabhūtadayāvantaḥ kevalaṁ jñānamāsthitāḥ.

12. avyaktaikatvam iti āhuḥ nānātvam puruṣaḥ tathā
sarvabhūtadayāvantaḥ kevalam jñānam āsthitāḥ

12. avyaktaikatvam iti āhuḥ tathā puruṣaḥ nānātvam
sarvabhūtadayāvantaḥ kevalam jñānam āsthitāḥ

12. They declare the unmanifest (avyakta) to be one, and similarly, the cosmic person (puruṣa) to be manifold. [These are the wise] who are compassionate towards all beings and are established solely in knowledge.

Words meanings summery:

• अव्यक्तैकत्वम् (avyaktaikatvam) - the oneness of the unmanifest

• इति (iti) - thus, so, indicating direct speech or thought

• आहुः (āhuḥ) - they say, they declare

• नानात्वम् (nānātvam) - manifoldness, multiplicity, diversity

• पुरुषः (puruṣaḥ) - the cosmic person (puruṣa), spirit, soul

• तथा (tathā) - similarly, thus, so

• सर्वभूतदयावन्तः (sarvabhūtadayāvantaḥ) - those possessing compassion for all beings

• केवलम् (kevalam) - solely, purely (modifies knowledge) (purely, solely, isolated, alone)

• ज्ञानम् (jñānam) - knowledge, wisdom

• आस्थिताः (āsthitāḥ) - established in, devoted to, dwelling in

Words meanings and morphology

अव्यक्तैकत्वम् (avyaktaikatvam) - the oneness of the unmanifest

(noun)

Accusative, neuter, singular of avyaktaikatva

avyaktaikatva - the state or quality of being the oneness of the unmanifest

formed with suffix -tva (abstract noun)

Compound type : ṣaṣṭhī-tatpuruṣa (avyakta+ekatva)

• avyakta – unmanifest, unrevealed, indistinct
  adjective (neuter)
  Past Passive Participle
  past passive participle of añj with vi prefix, negated by 'a'
  Prefix: vi
  Root: añj (class 7)
• ekatva – oneness, unity
  noun (neuter)
  formed with suffix -tva (abstract noun)

इति (iti) - thus, so, indicating direct speech or thought

(indeclinable)

आहुः (āhuḥ) - they say, they declare

(verb)

3rd person , plural, active, perfect (lit) of brū

Root: brū (class 2)

नानात्वम् (nānātvam) - manifoldness, multiplicity, diversity

(noun)

Accusative, neuter, singular of nānātva

nānātva - manifoldness, multiplicity, diversity, difference

formed with suffix -tva (abstract noun)

पुरुषः (puruṣaḥ) - the cosmic person (puruṣa), spirit, soul

(noun)

Nominative, masculine, singular of puruṣa

puruṣa - cosmic person, spirit, soul, man, male

तथा (tathā) - similarly, thus, so

(indeclinable)

सर्वभूतदयावन्तः (sarvabhūtadayāvantaḥ) - those possessing compassion for all beings

(adjective)

Nominative, masculine, plural of sarvabhūtadayā-vat

sarvabhūtadayā-vat - endowed with compassion for all beings

derived from sarvabhūtadayā with the possessive suffix -vat

Compound type : bahuvrihi (sarva+bhūta+dayā+vat)

• sarva – all, every, whole
  adjective (masculine)
• bhūta – being, creature, element, what has been
  noun (neuter)
  Past Passive Participle
  past passive participle of bhū
  Root: bhū (class 1)
• dayā – compassion, mercy, sympathy
  noun (feminine)
  verbal noun from day
  Root: day (class 1)
• vat – suffix indicating possession ('having', 'endowed with')
  indeclinable

केवलम् (kevalam) - solely, purely (modifies knowledge) (purely, solely, isolated, alone)

(adjective)

Accusative, neuter, singular of kevala

kevala - alone, isolated, pure, simple, whole, complete

Note: Used adverbially here.

ज्ञानम् (jñānam) - knowledge, wisdom

(noun)

Accusative, neuter, singular of jñāna

jñāna - knowledge, wisdom, understanding

verbal noun from jñā

Root: jñā (class 9)

आस्थिताः (āsthitāḥ) - established in, devoted to, dwelling in

(adjective)

Nominative, masculine, plural of āsthita

āsthita - established, situated, devoted to, engaged in, resorting to

Past Passive Participle

past passive participle of sthā with ā prefix

Prefix: ā

Root: sthā (class 1)