योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-51, verse-51

अमूर्त एव चित्तात्मा खत्वमस्यातिपीनता ।
वाततास्य महागुल्मो देहतास्य सुमेरुता ॥ ५१ ॥

amūrta eva cittātmā khatvamasyātipīnatā ,
vātatāsya mahāgulmo dehatāsya sumerutā 51

51. amūrtaḥ eva cittātmā kha-tvam asya atipīnatā
vātatā asya mahā-gulmaḥ dehatā asya sumerutā

51. cittātmā amūrtaḥ eva.
asya kha-tvam atipīnatā.
asya vātatā mahā-gulmaḥ.
asya dehatā sumerutā.

51. The consciousness-self (cittātman) is indeed formless. Its spatial nature (kha-tvam) is its excessive density/grossness. Its airy nature is its great mass, and its bodily nature is its mountain-like vastness (sumerutā).

Words meanings summery:

• अमूर्तः (amūrtaḥ) - formless, incorporeal, unmanifested

• एव (eva) - indeed, certainly, only

• चित्तात्मा (cittātmā) - the consciousness-self, the soul of thought (cittātman)

• ख-त्वम् (kha-tvam) - ether-nature, spatiality, etherealness

• अस्य (asya) - of this, its

• अतिपीनता (atipīnatā) - excessive fatness/plumpness, grossness, density

• वातता (vātatā) - wind-nature, airy quality

• महा-गुल्मः (mahā-gulmaḥ) - a large mass/tumor, a large shrub/bush

• देहता (dehatā) - bodily nature, corporality

• सुमेरुता (sumerutā) - the quality of Sumeru, mountain-like vastness/solidity

Words meanings and morphology

अमूर्तः (amūrtaḥ) - formless, incorporeal, unmanifested

(adjective)

Nominative, masculine, singular of amūrta

amūrta - formless, incorporeal, unmanifested, subtle

Compound type : nañ-tatpuruṣa (a+mūrta)

• a – not, non-, un-
  indeclinable
• mūrta – formed, manifest, embodied, having a definite shape
  adjective (masculine)
  Past Passive Participle
  From root mūrch
  Root: mūrch (class 1)

एव (eva) - indeed, certainly, only

(indeclinable)

चित्तात्मा (cittātmā) - the consciousness-self, the soul of thought (cittātman)

(noun)

Nominative, masculine, singular of cittātman

cittātman - the consciousness-self, the soul as intelligence, the mind-soul, pure consciousness

Compound type : tatpuruṣa (citta+ātman)

• citta – mind, thought, consciousness, heart, intellect
  noun (neuter)
  Root: cit (class 1)
• ātman – self, soul, spirit, the supreme cosmic person (ātman)
  noun (masculine)
  Root: an (class 2)

ख-त्वम् (kha-tvam) - ether-nature, spatiality, etherealness

(noun)

Nominative, neuter, singular of kha-tva

kha-tva - the nature of space/ether, spatiality, voidness

Suffixed with -tva (abstract noun forming suffix)

Compound type : tatpuruṣa (kha+tva)

• kha – space, ether, sky, air, zero
  noun (neuter)
• tva – suffix forming abstract nouns, -ness, -hood
  suffix (neuter)
  Abstract noun forming suffix.

अस्य (asya) - of this, its

(pronoun)

Genitive, masculine/neuter, singular of idam

idam - this, this one

Genitive singular of idam (masculine/neuter).

अतिपीनता (atipīnatā) - excessive fatness/plumpness, grossness, density

(noun)

Nominative, feminine, singular of atipīnatā

atipīnatā - excessive fatness, plumpness, extreme grossness, density

Derived from ati-pīna + -tā (abstract noun suffix)

Compound type : karmadhāraya (ati+pīna+tā)

• ati – beyond, excessive, very, over
  indeclinable
• pīna – fat, plump, large, full, thick
  adjective (masculine)
  Past Passive Participle
  From root pyāy (to swell, grow fat)
  Root: pyāy (class 1)
• tā – suffix forming abstract nouns, -ness, -hood
  suffix (feminine)
  Abstract noun forming suffix.

वातता (vātatā) - wind-nature, airy quality

(noun)

Nominative, feminine, singular of vātatā

vātatā - the nature of wind, airy quality

Derived from vāta + -tā (abstract noun suffix)

Root: vā (class 2)

महा-गुल्मः (mahā-gulmaḥ) - a large mass/tumor, a large shrub/bush

(noun)

Nominative, masculine, singular of mahā-gulma

mahā-gulma - a large bush, a thicket, a large splenic enlargement, a huge mass or tumor

Compound type : karmadhāraya (mahā+gulma)

• mahā – great, large, mighty
  adjective
• gulma – bush, shrub, cluster, thicket, a tumor in the abdomen (especially of the spleen), a military division
  noun (masculine)

देहता (dehatā) - bodily nature, corporality

(noun)

Nominative, feminine, singular of dehatā

dehatā - the state or nature of a body, corporality

Derived from deha + -tā (abstract noun suffix)

Root: dih (class 4)

सुमेरुता (sumerutā) - the quality of Sumeru, mountain-like vastness/solidity

(noun)

Nominative, feminine, singular of sumerutā

sumerutā - the quality of Sumeru (the mythical golden mountain, center of the universe), mountain-like vastness, solidity

Derived from Sumeru + -tā (abstract noun suffix)