योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-99, verse-23

अखण्डचित्ता शैलादिसत्ता निद्रा च भूरुहाम् ।
द्वैतोपलम्भमुक्तत्वात्खमेवैकमतो जगत् ॥ २३ ॥

akhaṇḍacittā śailādisattā nidrā ca bhūruhām ,
dvaitopalambhamuktatvātkhamevaikamato jagat 23

23. akhaṇḍacittā śailādisattā nidrā ca bhūruhām
dvaitopalambhamuktatvāt kham eva ekam ataḥ jagat

23. akhaṇḍacittā śailādisattā bhūruhām nidrā ca
dvaitopalambhamuktatvāt ataḥ jagat ekam kham eva

23. The unbroken consciousness, the existence of mountains and the like, and even the "sleep" of plants (bhūruhām) – because of being free from the perception of duality, the world (jagat) is therefore indeed only one space (kham).

Words meanings summery:

• अखण्डचित्ता (akhaṇḍacittā) - undivided mind, unbroken consciousness

• शैलादिसत्ता (śailādisattā) - the existence of mountains and so forth

• निद्रा (nidrā) - the inertness or unresponsiveness of plants (sleep, slumber, unconscious state)

• च (ca) - and, also

• भूरुहाम् (bhūruhām) - of trees, of plants

• द्वैतोपलम्भमुक्तत्वात् (dvaitopalambhamuktatvāt) - because of being free from the perception of duality

• खम् (kham) - ultimate reality or pure consciousness, synonymous with Brahman (space, ether, Brahman, void)

• एव (eva) - indeed, only, just

• एकम् (ekam) - one, single, unitary

• अतः (ataḥ) - therefore, hence, from this

• जगत् (jagat) - the world, universe

Words meanings and morphology

अखण्डचित्ता (akhaṇḍacittā) - undivided mind, unbroken consciousness

(adjective)

Nominative, feminine, singular of akhaṇḍacitta

akhaṇḍacitta - undivided mind, unbroken consciousness

Compound type : karmadhāraya (akhaṇḍa+citta)

• akhaṇḍa – undivided, unbroken, whole
  adjective
  From a- (negation) + khaṇḍa (broken, divided)
  Prefix: a
  Root: khaṇḍ (class 1)
• citta – mind, consciousness, thought
  noun (neuter)
  From cit (to perceive, understand)
  Root: cit (class 1)

Note: This adjective could modify sattā or nidrā or refer to the underlying reality itself. Given the context, it seems to describe the nature of reality.

शैलादिसत्ता (śailādisattā) - the existence of mountains and so forth

(noun)

Nominative, feminine, singular of śailādisattā

śailādisattā - the existence of mountains etc.

Compound type : tatpuruṣa (śailādi+sattā)

• śailādi – mountains and so forth, beginning with mountains
  noun (masculine)
  From śaila (mountain) + ādi (beginning, and so forth)
• sattā – existence, being, reality
  noun (feminine)
  From sat (being, existing)
  Root: as (class 2)

Note: Subject of the sentence.

निद्रा (nidrā) - the inertness or unresponsiveness of plants (sleep, slumber, unconscious state)

(noun)

Nominative, feminine, singular of nidrā

nidrā - sleep, slumber

Root: drā (class 2)

Note: Subject of the sentence.

च (ca) - and, also

(indeclinable)

भूरुहाम् (bhūruhām) - of trees, of plants

(noun)

Genitive, masculine, plural of bhūruha

bhūruha - tree, plant (literally "earth-grower")

Compound: bhū (earth) + ruh (to grow).

Root: ruh (class 1)

Note: Qualifies nidrā. "The sleep of plants".

द्वैतोपलम्भमुक्तत्वात् (dvaitopalambhamuktatvāt) - because of being free from the perception of duality

(noun)

Ablative, neuter, singular of dvaitopalambhamuktatva

dvaitopalambhamuktatva - the state of being free from the perception of duality

Formed with suffix tvāt from the abstract noun dvaitopalambhamuktatva.

Compound type : tatpuruṣa (dvaita+upalambha+mukta+tva)

• dvaita – duality, dualism
  noun (neuter)
  From dvi (two) + ta suffix.
• upalambha – perception, apprehension, obtaining
  noun (masculine)
  From upa + labh (to obtain, perceive).
  Prefix: upa
  Root: labh (class 1)
• mukta – free, released, liberated
  adjective
  Past Passive Participle
  From root muc (to release).
  Root: muc (class 6)
• tva – -ness, -hood, state of being
  suffix (neuter)
  Abstract noun suffix.

Note: Indicates cause or reason.

खम् (kham) - ultimate reality or pure consciousness, synonymous with Brahman (space, ether, Brahman, void)

(noun)

Nominative, neuter, singular of kha

kha - space, ether, void

Note: Predicate nominative with jagāt and ekam.

एव (eva) - indeed, only, just

(indeclinable)

एकम् (ekam) - one, single, unitary

(adjective)

Nominative, neuter, singular of eka

eka - one, single, unique

Note: Predicate nominative.

अतः (ataḥ) - therefore, hence, from this

(indeclinable)

From idam (this) + tasi suffix.

जगत् (jagat) - the world, universe

(noun)

Nominative, neuter, singular of jagat

jagat - the world, universe, what moves

Present active participle of gam (to go), used as a noun.

Root: gam (class 1)