योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-19, verse-24

स्वगृहाभ्यन्तराकाशे चित्ताकाशमयात्मनि ।
तस्मिन्द्विजे शवीभूते भूताकाशशरीरिणि ॥ २४ ॥

svagṛhābhyantarākāśe cittākāśamayātmani ,
tasmindvije śavībhūte bhūtākāśaśarīriṇi 24

24. svagṛhābhyantarākāśe cittākāśamayātmani
tasmin dvije śavībhūte bhūtākāśaśarīriṇi

24. tasmin dvije svagṛhābhyantarākāśe
cittākāśamayātmani śavībhūte bhūtākāśaśarīriṇi

24. In that twice-born (dvija) who, having become like a corpse, dwells within the inner space of his own abode, and whose self (ātman) is one with the expanse of consciousness (cittākāśa), and whose body is the elemental space (bhūtākāśa).

Words meanings summery:

• स्वगृहाभ्यन्तराकाशे (svagṛhābhyantarākāśe) - referring to a secluded, internal, or contemplative realm, perhaps for meditation (in the inner space of one's own house/abode)

• चित्ताकाशमयात्मनि (cittākāśamayātmani) - referring to a profound state where the individual self is identified with the vastness of universal consciousness (in him whose self (ātman) consists of the space of consciousness (cittākāśa))

• तस्मिन् (tasmin) - in that

• द्विजे (dvije) - in the Brahmin or sage, given the spiritual context (in the twice-born (dvija))

• शवीभूते (śavībhūte) - in a state of profound yogic trance or samadhi, where the body appears lifeless and inert (having become like a corpse, turned into a corpse)

• भूताकाशशरीरिणि (bhūtākāśaśarīriṇi) - in him whose subtle body has expanded to encompass the cosmic elemental space, indicating a state of cosmic consciousness (in him whose body is the elemental space (bhūtākāśa))

Words meanings and morphology

स्वगृहाभ्यन्तराकाशे (svagṛhābhyantarākāśe) - referring to a secluded, internal, or contemplative realm, perhaps for meditation (in the inner space of one's own house/abode)

(noun)

Locative, masculine, singular of svagṛhābhyantarākāśa

svagṛhābhyantarākāśa - the inner space within one's own house or dwelling

Compound type : ṣaṣṭhī-tatpuruṣa (sva+gṛha+abhyantara+ākāśa)

• sva – own, one's own, proper
  pronoun
• gṛha – house, dwelling, abode
  noun (neuter)
  Root: grah (class 9)
• abhyantara – inner, internal, interior; intimate
  adjective
  Prefix: abhi
  Root: antar
• ākāśa – space, ether, sky; the subtle element of space
  noun (masculine)
  Prefix: ā
  Root: kāś (class 1)

Note: Modifies the noun dvija in the locative case.

चित्ताकाशमयात्मनि (cittākāśamayātmani) - referring to a profound state where the individual self is identified with the vastness of universal consciousness (in him whose self (ātman) consists of the space of consciousness (cittākāśa))

(adjective)

Locative, masculine, singular of cittākāśamayātman

cittākāśamayātman - one whose self (ātman) is made of, or consists of, the space of consciousness (cittākāśa)

Compound type : bahuvrīhi (citta+ākāśa+maya+ātman)

• citta – mind, consciousness, thought, intellect
  noun (neuter)
  Root: cit (class 1)
• ākāśa – space, ether, sky; the subtle element of space
  noun (masculine)
  Prefix: ā
  Root: kāś (class 1)
• maya – made of, consisting of, full of, pertaining to
  suffix
  Primary suffix used to form adjectives or nouns, indicating material, composition, or abundance.
• ātman – self, soul, spirit, essence; the individual or universal Self
  noun (masculine)
  Root: at (class 1)

Note: Modifies dvije.

तस्मिन् (tasmin) - in that

(pronoun)

Locative, masculine, singular of tad

tad - that, he, she, it (demonstrative pronoun)

Note: Modifies dvije.

द्विजे (dvije) - in the Brahmin or sage, given the spiritual context (in the twice-born (dvija))

(noun)

Locative, masculine, singular of dvija

dvija - twice-born (a Brahmin, Kshatriya, or Vaishya); a bird; a tooth

Compound type : upapada-tatpuruṣa (dvi+ja)

• dvi – two
  numeral
• ja – born, produced from
  suffix
  Suffix derived from the root jan (to be born).
  Root: jan (class 4)

Note: The main noun being modified by the preceding and following locative adjectives.

शवीभूते (śavībhūte) - in a state of profound yogic trance or samadhi, where the body appears lifeless and inert (having become like a corpse, turned into a corpse)

(adjective)

Locative, masculine, singular of śavībhūta

śavībhūta - become a corpse, turned into a corpse, rendered lifeless

Past Passive Participle

Derived from śava (corpse) and bhūta (become, PPP of bhū), with the suffix -ī- used for 'becoming' or 'being transformed into'.

Root: bhū (class 1)

Note: Modifies dvije.

भूताकाशशरीरिणि (bhūtākāśaśarīriṇi) - in him whose subtle body has expanded to encompass the cosmic elemental space, indicating a state of cosmic consciousness (in him whose body is the elemental space (bhūtākāśa))

(adjective)

Locative, masculine, singular of bhūtākāśaśarīrin

bhūtākāśaśarīrin - one whose body (śarīra) is the elemental space (bhūtākāśa), or who embodies the elemental space

Compound type : bahuvrīhi (bhūta+ākāśa+śarīrin)

• bhūta – element (especially one of the five great elements - mahābhūta); being, creature, past
  noun (neuter)
  Past Passive Participle
  Derived from the root bhū (to be, to become); here, referring to the element of space.
  Root: bhū (class 1)
• ākāśa – space, ether, sky; the subtle element of space
  noun (masculine)
  Prefix: ā
  Root: kāś (class 1)
• śarīrin – embodied, possessing a body; the soul, an embodied being
  noun (masculine)
  Derived from śarīra (body) with the possessive suffix -in.
  Root: śṛ

Note: Modifies dvije.