योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-18, verse-8

सच्छायो देहवृक्षोऽयं जीवपान्थगणास्पदः ।
कस्यात्मीयः कस्य पर आस्थानास्थे किलात्र के ॥ ८ ॥

sacchāyo dehavṛkṣo'yaṃ jīvapānthagaṇāspadaḥ ,
kasyātmīyaḥ kasya para āsthānāsthe kilātra ke 8

8. sat-chāyaḥ deha-vṛkṣaḥ ayam jīva-pāntha-gaṇa-āspadaḥ
kasya ātmīyaḥ kasya para āsthā-anāsthe kila atra ke

8. This body-tree, providing good shade, is an abode for multitudes of traveling souls (jīva). To whom does it truly belong (as one's own ātman)? To whom is it alien? What significance do attachment (āsthā) and non-attachment (anāsthā) hold here?

Words meanings summery:

• सत्-छायः (sat-chāyaḥ) - providing good shade (having good shade/shadow)

• देह-वृक्षः (deha-vṛkṣaḥ) - this body-tree (body-tree)

• अयम् (ayam) - this (this, this one)

• जीव-पान्थ-गण-आस्पदः (jīva-pāntha-gaṇa-āspadaḥ) - an abode for multitudes of traveling souls (jīva) (an abode for groups of living being-travelers)

• कस्य (kasya) - whose (whose, of what)

• आत्मीयः (ātmīyaḥ) - (as) one's own (ātman) (one's own, belonging to oneself, intimate)

• कस्य (kasya) - whose (whose, of what)

• पर (para) - (as) alien/foreign (other, alien, supreme, distant)

• आस्था-अनास्थे (āsthā-anāsthe) - attachment and non-attachment

• किल (kila) - indeed (indeed, certainly, as if, for example)

• अत्र (atra) - here (here, in this place, on this occasion)

• के (ke) - what (significance/purpose) (what, which (plural))

Words meanings and morphology

सत्-छायः (sat-chāyaḥ) - providing good shade (having good shade/shadow)

(adjective)

Nominative, masculine, singular of sacchāya

sacchāya - having good shade or shadow

Bahuvrīhi compound: 'sat' (good/true) + 'chāyā' (shade/shadow). The final 't' of 'sat' becomes 'c' before 'ch'.

Compound type : Bahuvrīhi (sat+chāyā)

• sat – good, true, real, existing
  adjective (neuter)
  Present Active Participle
  From the root 'as' (to be) with the suffix '-śatṛ'.
  Root: as (class 2)
• chāyā – shade, shadow, reflection, luster
  noun (feminine)

Note: Qualifies 'dehavṛkṣaḥ'.

देह-वृक्षः (deha-vṛkṣaḥ) - this body-tree (body-tree)

(noun)

Nominative, masculine, singular of dehavṛkṣa

dehavṛkṣa - the body considered as a tree

Karmadhāraya compound (a tree which is the body).

Compound type : Karmadhāraya (deha+vṛkṣa)

• deha – body, form, person
  noun (masculine)
  From the root 'dih' (to smear, to grow).
  Root: dih (class 1)
• vṛkṣa – tree
  noun (masculine)

Note: Subject of the sentence.

अयम् (ayam) - this (this, this one)

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Demonstrative pronoun, nominative singular masculine form.

Note: Agrees with 'dehavṛkṣaḥ'.

जीव-पान्थ-गण-आस्पदः (jīva-pāntha-gaṇa-āspadaḥ) - an abode for multitudes of traveling souls (jīva) (an abode for groups of living being-travelers)

(noun)

Nominative, masculine, singular of jīvapānthagaṇāspada

jīvapānthagaṇāspada - an abode for groups of living beings (jīva) who are travelers

Tatpuruṣa compound: 'jīva' (living being) + 'pāntha' (traveler) + 'gaṇa' (group) + 'āspada' (abode).

Compound type : Tatpuruṣa (jīva+pāntha+gaṇa+āspada)

• jīva – living, existing; soul, living being
  noun (masculine)
  From the root 'jīv' (to live).
  Root: jīv (class 1)
• pāntha – traveler, wayfarer
  noun (masculine)
  Derived from 'path' (path).
• gaṇa – group, multitude, collection, host
  noun (masculine)
  From the root 'gaṇ' (to count).
  Root: gaṇ (class 10)
• āspada – abode, seat, place, subject
  noun (neuter)
  From the root 'pad' (to go) with the prefix 'ā' and suffix '-a'.
  Prefix: ā
  Root: pad (class 4)

Note: Predicative noun, qualifying 'dehavṛkṣaḥ'.

कस्य (kasya) - whose (whose, of what)

(pronoun)

Genitive, masculine, singular of kim

kim - who, what, which

Interrogative pronoun, genitive singular masculine/neuter.

Note: Possessive form of 'kim'.

आत्मीयः (ātmīyaḥ) - (as) one's own (ātman) (one's own, belonging to oneself, intimate)

(adjective)

Nominative, masculine, singular of ātmīya

ātmīya - one's own, peculiar to oneself, intimate

Derived from 'ātman' (self) with the suffix '-īya'.

Note: Predicative adjective.

कस्य (kasya) - whose (whose, of what)

(pronoun)

Genitive, masculine, singular of kim

kim - who, what, which

Interrogative pronoun, genitive singular masculine/neuter.

Note: Possessive form of 'kim'.

पर (para) - (as) alien/foreign (other, alien, supreme, distant)

(adjective)

Nominative, masculine, singular of para

para - other, foreign, alien, supreme, distant

आस्था-अनास्थे (āsthā-anāsthe) - attachment and non-attachment

(noun)

Nominative, feminine, dual of āsthā-anāsthā

āsthā-anāsthā - attachment and non-attachment

Dvandva compound of 'āsthā' and 'anāsthā', used in the dual form.

Compound type : Dvandva (āsthā+anāsthā)

• āsthā – attachment, faith, trust, reverence
  noun (feminine)
  From the root 'sthā' (to stand) with the prefix 'ā' and suffix '-a'.
  Prefix: ā
  Root: sthā (class 1)
• anāsthā – non-attachment, indifference, disrespect
  noun (feminine)
  Negative compound ('an-' + 'āsthā').
  Prefixes: an+ā
  Root: sthā (class 1)

Note: Used as the subject of the question.

किल (kila) - indeed (indeed, certainly, as if, for example)

(indeclinable)

Particle, often used for emphasis or to express doubt/question.

अत्र (atra) - here (here, in this place, on this occasion)

(indeclinable)

Locative adverb formed from the pronoun 'idam'.

के (ke) - what (significance/purpose) (what, which (plural))

(pronoun)

Nominative, neuter, dual of kim

kim - who, what, which

Interrogative pronoun, nominative dual (masculine, feminine, or neuter).