योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-18, verse-43

अनन्तः सत्स्वरूपस्त्वं खमिवातिततान्तरम् ।
प्रकाशो नित्यशुद्धस्त्वं ज्वालानामिव कोटरम् ॥ ४३ ॥

anantaḥ satsvarūpastvaṃ khamivātitatāntaram ,
prakāśo nityaśuddhastvaṃ jvālānāmiva koṭaram 43

43. anantaḥ satsvarūpaḥ tvam kham iva atitatāntaram
prakāśaḥ nityaśuddhaḥ tvam jvālānām iva koṭaram

43. tvam anantaḥ satsvarūpaḥ atitatāntaram kham iva
tvam nityaśuddhaḥ prakāśaḥ jvālānām koṭaram iva

43. You are infinite, whose very nature is pure existence. You are like space, with an immensely vast interior. You are eternally pure effulgence, like the core (or source) of flames.

Words meanings summery:

• अनन्तः (anantaḥ) - infinite, endless, boundless

• सत्स्वरूपः (satsvarūpaḥ) - whose very nature is pure existence (whose nature is existence/truth, embodiment of truth)

• त्वम् (tvam) - you

• खम् (kham) - space, ether, sky

• इव (iva) - like (like, as, as if)

• अतिततान्तरम् (atitatāntaram) - with an immensely vast interior (whose interior is exceedingly vast/extended)

• प्रकाशः (prakāśaḥ) - eternally pure effulgence (light, radiance, manifestation)

• नित्यशुद्धः (nityaśuddhaḥ) - eternally pure

• त्वम् (tvam) - you

• ज्वालानाम् (jvālānām) - of flames

• इव (iva) - like (like, as, as if)

• कोटरम् (koṭaram) - the core (or source) (hollow, cavity, inner part, core)

Words meanings and morphology

अनन्तः (anantaḥ) - infinite, endless, boundless

(adjective)

Nominative, masculine, singular of ananta

ananta - infinite, endless, boundless, Vishnu, Shesha (the cosmic serpent)

Negation an + anta (end).

Compound type : nañ-tatpuruṣa (a+anta)

• a – not, un-
  indeclinable
  Negative prefix.
• anta – end, limit, boundary
  noun (masculine)

Note: Qualifies tvam.

सत्स्वरूपः (satsvarūpaḥ) - whose very nature is pure existence (whose nature is existence/truth, embodiment of truth)

(adjective)

Nominative, masculine, singular of satsvarūpa

satsvarūpa - whose nature is existence, embodiment of truth, truly existing, having the form of reality

Compound of sat (existence, truth) and svarūpa (one's own form or nature).

Compound type : karmadhāraya (sat+svarūpa)

• sat – being, existent, good, true, reality
  adjective (neuter)
  Present Active Participle
  From root as (to be).
  Root: as (class 2)
• svarūpa – one's own form, own nature, identity, essence
  noun (neuter)
  Compound of sva (own) and rūpa (form).

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

खम् (kham) - space, ether, sky

(noun)

Nominative, neuter, singular of kha

kha - space, ether, sky, air, zero

Note: Used in comparison.

इव (iva) - like (like, as, as if)

(indeclinable)

अतिततान्तरम् (atitatāntaram) - with an immensely vast interior (whose interior is exceedingly vast/extended)

(adjective)

Nominative, neuter, singular of atitatāntara

atitatāntara - whose interior is exceedingly vast, having a very expansive inner space

Bahuvrīhi compound: ati (exceedingly) + tatā (stretched, vast - from tan) + antara (interior).

Compound type : bahuvrīhi (ati+tata+antara)

• ati – exceedingly, beyond, over
  indeclinable
  Prefix/indeclinable.
• tata – stretched, extended, vast, spread out
  adjective
  Past Passive Participle
  From root tan (to stretch, extend).
  Root: tan (class 8)
• antara – interior, inner, interval, difference
  noun (neuter)

Note: Used adverbially or as a predicate.

प्रकाशः (prakāśaḥ) - eternally pure effulgence (light, radiance, manifestation)

(noun)

Nominative, masculine, singular of prakāśa

prakāśa - light, brightness, radiance, manifestation, appearance, publicity

From pra (forth) + root kāś (to shine).

Prefix: pra

Root: kāś (class 1)

नित्यशुद्धः (nityaśuddhaḥ) - eternally pure

(adjective)

Nominative, masculine, singular of nityaśuddha

nityaśuddha - eternally pure, always clean, ever-undefiled

Compound of nitya (eternal) and śuddha (pure).

Compound type : karmadhāraya (nitya+śuddha)

• nitya – eternal, constant, perpetual, regular
  adjective
• śuddha – pure, clean, clear, spotless
  adjective
  Past Passive Participle
  From root śudh (to purify).
  Root: śudh (class 4)

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

ज्वालानाम् (jvālānām) - of flames

(noun)

Genitive, feminine, plural of jvālā

jvālā - flame, blaze, flash

From root jval (to burn, shine).

Root: jval (class 1)

Note: Possessive, related to koṭaram.

इव (iva) - like (like, as, as if)

(indeclinable)

कोटरम् (koṭaram) - the core (or source) (hollow, cavity, inner part, core)

(noun)

Nominative, neuter, singular of koṭara

koṭara - hollow, cavity, hole (in a tree), interior, core

Note: The comparison object.