योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-184, verse-21

अमौनमौनं जीवात्म यत्पाषाणवदासनम् ।
यत्सदेवासदाभासं तद्ब्रह्माभिधमुच्यते ॥ २१ ॥

amaunamaunaṃ jīvātma yatpāṣāṇavadāsanam ,
yatsadevāsadābhāsaṃ tadbrahmābhidhamucyate 21

21. amauna-maunam jīva-ātman yat pāṣāṇa-vat āsanam yat
sat-eva-asat-ābhāsam tat brahma-abhidham ucyate

21. yat jīva-ātman amauna-maunam pāṣāṇa-vat āsanam yat
sat-eva-asat-ābhāsam tat brahma-abhidham ucyate

21. That which is the profound, active silence (amauna-maunam) of the individual self (jīva-ātman), a state of stillness like a stone, and which appears as both existent and non-existent—that is called by the name Brahman (brahman).

Words meanings summery:

• अमौन-मौनम् (amauna-maunam) - the silence beyond ordinary silence, profound silence

• जीव-आत्मन् (jīva-ātman) - the living soul, the individual self (ātman)

• यत् (yat) - Refers to Brahman as the antecedent. (which, that (neuter))

• पाषाण-वत् (pāṣāṇa-vat) - Describing a state of profound stillness. (like a stone, stone-like)

• आसनम् (āsanam) - state of profound stillness or being. (sitting, posture, state of being, seat)

• यत् (yat) - Refers to Brahman as the antecedent. (which, that (neuter))

• सत्-एव-असत्-आभासम् (sat-eva-asat-ābhāsam) - appearing as both existent and non-existent

• तत् (tat) - Refers to Brahman. (that)

• ब्रह्म-अभिधम् (brahma-abhidham) - called Brahman (brahman), having the name Brahman

• उच्यते (ucyate) - is said, is called

Words meanings and morphology

अमौन-मौनम् (amauna-maunam) - the silence beyond ordinary silence, profound silence

(noun)

Nominative, neuter, singular of amauna-mauna

amauna-mauna - (the state of) non-silence that is also silence, profound stillness beyond speech

Compound, possibly karmadhāraya or dvandva implying a unique state of silence.

Compound type : karmadhāraya (amauna+mauna)

• amauna – not silent, noisy, or beyond silence
  adjective (neuter)
  Negative particle 'a' + 'mauna'.
  Prefix: a
• mauna – silence, quiet, taciturnity
  noun (neuter)
  From muni (sage) + aṇ (suffix).

जीव-आत्मन् (jīva-ātman) - the living soul, the individual self (ātman)

(noun)

Nominative, masculine, singular of jīva-ātman

jīva-ātman - the living soul, individual self (ātman)

Tatpurusha compound.

Compound type : tatpurusha (jīva+ātman)

• jīva – living, existing, life, soul
  adjective/noun (masculine)
  From root jīv (to live).
  Root: jīv (class 1)
• ātman – self (ātman), soul, essence, breath
  noun (masculine)

यत् (yat) - Refers to Brahman as the antecedent. (which, that (neuter))

(pronoun)

Nominative, neuter, singular of yad

yad - which, what

Relative pronoun.

पाषाण-वत् (pāṣāṇa-vat) - Describing a state of profound stillness. (like a stone, stone-like)

(indeclinable)

Derived from pāṣāṇa + vat (suffix meaning 'like').

आसनम् (āsanam) - state of profound stillness or being. (sitting, posture, state of being, seat)

(noun)

Nominative, neuter, singular of āsana

āsana - sitting, seat, posture, state of being

From root ās (to sit).

Root: ās (class 2)

यत् (yat) - Refers to Brahman as the antecedent. (which, that (neuter))

(pronoun)

Nominative, neuter, singular of yad

yad - which, what

Relative pronoun.

सत्-एव-असत्-आभासम् (sat-eva-asat-ābhāsam) - appearing as both existent and non-existent

(adjective)

Nominative, neuter, singular of sat-eva-asat-ābhāsa

sat-eva-asat-ābhāsa - appearing as both existent and non-existent, simultaneously real and unreal

Compound.

Compound type : tatpurusha (sat+eva+asat+ābhāsa)

• sat – existing, real, true, good, being
  participle/adjective/noun (neuter)
  Present Active Participle
  From root as (to be).
  Root: as (class 2)
• eva – indeed, truly, only
  indeclinable
• asat – non-existent, unreal, false, evil, non-being
  participle/adjective/noun (neuter)
  Negative of Present Active Participle
  Negation of sat (a- + sat).
  Prefix: a
  Root: as (class 2)
• ābhāsa – appearance, semblance, reflection, light
  noun (masculine)
  From ā-bhās (to shine forth, appear).
  Prefix: ā
  Root: bhās (class 1)

Note: Agrees with the implied subject (Brahman).

तत् (tat) - Refers to Brahman. (that)

(pronoun)

Nominative, neuter, singular of tad

tad - that, he, she, it

Demonstrative pronoun.

ब्रह्म-अभिधम् (brahma-abhidham) - called Brahman (brahman), having the name Brahman

(adjective)

Nominative, neuter, singular of brahma-abhidha

brahma-abhidha - having the name Brahman (brahman), called Brahman

Compound.

Compound type : tatpurusha (brahman+abhidhā)

• brahman – Brahman, the Absolute, universal spirit
  noun (neuter)
  Root: bṛh (class 1)
• abhidhā – name, appellation, expression
  noun (feminine)
  From abhi-dhā (to place upon, express).
  Prefix: abhi
  Root: dhā (class 3)

Note: Agrees with 'tat'.

उच्यते (ucyate) - is said, is called

(verb)

3rd person , singular, passive, present (laṭ) of vac

Present Tense, Passive Voice

Third person singular, passive voice, present indicative.

Root: vac (class 2)