योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-64, verse-21

कश्चिद्द्रागिति देहादिकलनाद्याति देहताम् ।
भ्रान्तित्वं तदतद्रूपं गन्धर्वैश्च वसत्पुरम् ॥ २१ ॥

kaściddrāgiti dehādikalanādyāti dehatām ,
bhrāntitvaṃ tadatadrūpaṃ gandharvaiśca vasatpuram 21

21. kaścit drāk iti dehādikalanāt yāti dehatām
bhrāntitvam tadatadrūpam gandharvaiḥ ca vasatpuram

21. kaścit dehādikalanāt drāk dehatām yāti ca
tadatadrūpam bhrāntitvam gandharvaiḥ vasatpuram

21. Some being instantly attains a physical form (dehatā) from the mere conception (kalanā) of a body, etc. This state is an illusion (bhrāntitva), manifesting as both real and unreal, akin to a city created and inhabited by Gandharvas.

Words meanings summery:

• कश्चित् (kaścit) - some living being or entity (someone, a certain one)

• द्राक् (drāk) - quickly, instantly, suddenly

• इति (iti) - marking a consequence or manner, 'as if' (thus, in this way, thinking)

• देहादिकलनात् (dehādikalanāt) - from the mental image or thought of a body, senses, etc. (from the conception of a body and so on)

• याति (yāti) - goes, attains, moves

• देहताम् (dehatām) - to the state of being a body, corporality

• भ्रान्तित्वम् (bhrāntitvam) - the state of being an illusory manifestation (illusion-ness, the state of being an illusion, delusion)

• तदतद्रूपम् (tadatadrūpam) - appearing as both existent and non-existent, real and illusory (having forms of both that (real) and not-that (unreal))

• गन्धर्वैः (gandharvaiḥ) - by Gandharvas

• च (ca) - and, also

• वसत्पुरम् (vasatpuram) - an illusory city, like a Gandharva city (Gandharvanagara) (a dwelling city, an inhabited city)

Words meanings and morphology

कश्चित् (kaścit) - some living being or entity (someone, a certain one)

(pronoun)

Nominative, masculine, singular of kaścid

kaścid - someone, a certain one, an indefinite person

द्राक् (drāk) - quickly, instantly, suddenly

(indeclinable)

इति (iti) - marking a consequence or manner, 'as if' (thus, in this way, thinking)

(indeclinable)

देहादिकलनात् (dehādikalanāt) - from the mental image or thought of a body, senses, etc. (from the conception of a body and so on)

(noun)

Ablative, feminine, singular of dehādikalanā

dehādikalanā - the mental conception or idea of a body and similar things (senses, mind)

Compound of dehādi (body etc.) and kalanā (conception).

Compound type : tatpurusha (dehādi+kalanā)

• dehādi – body and so on, beginning with the body
  noun (masculine)
  Compound of deha (body) + ādi (beginning, etc.).
• kalanā – calculation, conception, imagination, mental image, ascertainment
  noun (feminine)
  Derived from root kal (to reckon, compute).
  Root: kal (class 10)

याति (yāti) - goes, attains, moves

(verb)

3rd person , singular, active, present (laṭ) of yā

Present active indicative

Class 2 verb.

Root: yā (class 2)

देहताम् (dehatām) - to the state of being a body, corporality

(noun)

Accusative, feminine, singular of dehatā

dehatā - the state or condition of being a body, corporality

Derived from deha + tā (suffix forming abstract feminine nouns).

भ्रान्तित्वम् (bhrāntitvam) - the state of being an illusory manifestation (illusion-ness, the state of being an illusion, delusion)

(noun)

Nominative, neuter, singular of bhrāntitva

bhrāntitva - the state of being an illusion, delusion, error

Derived from bhrānti (illusion) + tva (suffix forming abstract neuter nouns).

तदतद्रूपम् (tadatadrūpam) - appearing as both existent and non-existent, real and illusory (having forms of both that (real) and not-that (unreal))

(adjective)

Nominative, neuter, singular of tadatadrūpa

tadatadrūpa - having the form of both that (real) and not-that (unreal), having a contradictory nature

Compound meaning 'having the form of tat and atat'. tat and atat are philosophical terms for real/existent and unreal/non-existent.

Compound type : bahuvrihi (tat+atat+rūpa)

• tat – that, it (often referring to Brahman or ultimate reality)
  pronoun (neuter)
• atat – not that, unreal, non-existent
  adjective (neuter)
  Prefix a- (negation) + tat.
• rūpa – form, shape, appearance, nature
  noun (neuter)

Note: Adjectival form, agreeing with bhrāntitvam.

गन्धर्वैः (gandharvaiḥ) - by Gandharvas

(proper noun)

Instrumental, masculine, plural of gandharva

gandharva - Gandharva (a class of celestial beings, often depicted as musicians or celestial spirits, known for creating illusory cities)

च (ca) - and, also

(indeclinable)

वसत्पुरम् (vasatpuram) - an illusory city, like a Gandharva city (Gandharvanagara) (a dwelling city, an inhabited city)

(noun)

Nominative, neuter, singular of vasatpura

vasatpura - a dwelling city, an inhabited city (often refers to a Gandharva-nagara, an illusory city)

Compound type : tatpurusha (vasat+pura)

• vasat – dwelling, existing, living
  adjective (neuter)
  Present active participle
  Derived from root vas (to dwell, reside).
  Root: vas (class 1)
• pura – city, town, fortress
  noun (neuter)

Note: This noun form agrees with bhrāntitvam, used as a simile.