योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-41, verse-45

संवित्संवेदनैकात्म पृथगेतदचेतनम् ।
संपद्यते परिज्ञातं संकल्पनगरोपमम् ॥ ४५ ॥

saṃvitsaṃvedanaikātma pṛthagetadacetanam ,
saṃpadyate parijñātaṃ saṃkalpanagaropamam 45

45. saṃvit-saṃvedana-ekātma pṛthak etat acetanam
saṃpadyate parijñātam saṃkalpa-nagara-upamam

45. etat acetanam saṃvit-saṃvedana-ekātma pṛthak
parijñātam saṃkalpa-nagara-upamam saṃpadyate

45. That which is unconscious (acetanam), distinct from the singular essence (ekātma) of consciousness (saṃvit) and perception (saṃvedana), when thoroughly understood (parijñātam), manifests as something akin to a city formed by mental intention (saṃkalpa).

Words meanings summery:

• संवित्-संवेदन-एकात्म (saṁvit-saṁvedana-ekātma) - The characteristic of the conscious principle being singular in its perceptive and knowing aspects. (having consciousness and perception as its single essence, of a singular nature of consciousness and perception)

• पृथक् (pṛthak) - In a distinct or separate manner from the conscious principle. (separately, distinctly, apart)

• एतत् (etat) - Referring to the object or entity being discussed, specifically the unconscious realm. (this, this one)

• अचेतनम् (acetanam) - The material or non-conscious aspect of existence, often contrasting with `saṃvit`. (unconscious, inanimate, insentient)

• संपद्यते (saṁpadyate) - Transforms into or manifests as, indicating a change of state. (becomes, happens, turns into, results in)

• परिज्ञातम् (parijñātam) - Once it is completely comprehended or brought to full awareness. (fully known, thoroughly understood, discerned)

• संकल्प-नगर-उपमम् (saṁkalpa-nagara-upamam) - The unconscious, when understood, takes on the form of a complex structure built from mental formations (saṃkalpa) or imagination. (like a city of mental constructs, resembling a city made of intentions)

Words meanings and morphology

संवित्-संवेदन-एकात्म (saṁvit-saṁvedana-ekātma) - The characteristic of the conscious principle being singular in its perceptive and knowing aspects. (having consciousness and perception as its single essence, of a singular nature of consciousness and perception)

(adjective)

Nominative, masculine, singular of saṃvit-saṃvedana-ekātman

saṁvit-saṁvedana-ekātman - of one nature with consciousness and perception, having consciousness and perception as its single self/essence

Bahuvrihi compound: 'that whose single self is consciousness and perception'.

Compound type : Bahuvrihi (saṃvit+saṃvedana+ekātman)

• saṃvit – consciousness, knowledge, understanding, intellect
  noun (feminine)
  From root `vid` (to know completely) with prefix `sam`.
  Prefix: sam
  Root: vid (class 2)
• saṃvedana – perception, sensation, feeling, consciousness
  noun (neuter)
  From root `vid` (to know, perceive) with prefix `sam`.
  Prefix: sam
  Root: vid (class 2)
• ekātman – one soul, one self, homogeneous, having a single nature or essence
  noun (masculine)
  Compound of `eka` (one) and `ātman` (self).

Note: Here implying 'that from which this unconscious entity is separate'.

पृथक् (pṛthak) - In a distinct or separate manner from the conscious principle. (separately, distinctly, apart)

(indeclinable)

एतत् (etat) - Referring to the object or entity being discussed, specifically the unconscious realm. (this, this one)

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one, it

Demonstrative pronoun.

Note: Subject of `saṃpadyate`.

अचेतनम् (acetanam) - The material or non-conscious aspect of existence, often contrasting with `saṃvit`. (unconscious, inanimate, insentient)

(adjective)

Nominative, neuter, singular of acetana

acetana - unconscious, insentient, inanimate, non-conscious

Compound of `a` (not) and `cetana` (conscious).

Root: cit (class 1)

Note: Agrees with `etat`.

संपद्यते (saṁpadyate) - Transforms into or manifests as, indicating a change of state. (becomes, happens, turns into, results in)

(verb)

3rd person , singular, middle, present (laṭ) of saṃpad

Root `pad` with prefix `sam`.

Prefix: sam

Root: pad (class 4)

परिज्ञातम् (parijñātam) - Once it is completely comprehended or brought to full awareness. (fully known, thoroughly understood, discerned)

(adjective)

Nominative, neuter, singular of parijñāta

parijñāta - known completely, fully understood, recognized, ascertained

Past Passive Participle

From root `jñā` with prefix `pari`.

Prefix: pari

Root: jñā (class 9)

Note: Modifies `etat acetanam`.

संकल्प-नगर-उपमम् (saṁkalpa-nagara-upamam) - The unconscious, when understood, takes on the form of a complex structure built from mental formations (saṃkalpa) or imagination. (like a city of mental constructs, resembling a city made of intentions)

(adjective)

Nominative, neuter, singular of saṃkalpa-nagara-upama

saṁkalpa-nagara-upama - like a city of mental intention/will, resembling a city created by imagination

Compound: `saṃkalpa` (mental intention) + `nagara` (city) + `upama` (resembling).

Compound type : Tatpuruṣa (saṃkalpa+nagara+upama)

• saṃkalpa – mental intention, resolve, will, concept, thought, creative imagination (saṃkalpa)
  noun (masculine)
  From `sam-kḷp` (to arrange, resolve).
  Prefix: sam
  Root: kḷp (class 1)
• nagara – city, town
  noun (neuter)
• upama – resembling, like, similar to
  adjective (masculine)

Note: Predicate adjective to `etat acetanam`.