योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-45, verse-13

शिलान्तरिव नीरन्ध्रः स्यन्दमानेन्दुबिम्बवत् ।
रसं स्वसंविदास्वाद्यं स्यन्दमान इवामृतम् ॥ १३ ॥

śilāntariva nīrandhraḥ syandamānendubimbavat ,
rasaṃ svasaṃvidāsvādyaṃ syandamāna ivāmṛtam 13

13. śilāantaḥ iva nīrandhraḥ syandamānaindubimbavat
rasam svasaṃvidāsvādyam syandamānaḥ iva amṛtam

13. (saḥ) nīrandhraḥ śilāantaḥ iva syandamānaindubimbavat (asti).
rasam svasaṃvidāsvādyam amṛtam iva syandamānaḥ (asti).

13. It is solid and without gaps, like that found within a rock, and like the flowing orb of the moon. It flows like nectar, a taste to be savored by one's own self-awareness (sva-saṃvid).

Words meanings summery:

• शिलाअन्तः (śilāantaḥ) - within a rock, inside a stone

• इव (iva) - like, as if, as, similar to

• नीरन्ध्रः (nīrandhraḥ) - without pores/gaps, solid, compact

• स्यन्दमानैन्दुबिम्बवत् (syandamānaindubimbavat) - like a flowing moon-orb

• रसम् (rasam) - essence, taste, fluid, juice, delight

• स्वसंविदास्वाद्यम् (svasaṁvidāsvādyam) - to be tasted by one's own consciousness/self-awareness; enjoyable by self-perception

• स्यन्दमानः (syandamānaḥ) - flowing, oozing

• इव (iva) - like, as if, as, similar to

• अमृतम् (amṛtam) - nectar, ambrosia, immortality

Words meanings and morphology

शिलाअन्तः (śilāantaḥ) - within a rock, inside a stone

(indeclinable)

Compound type : Tatpuruṣa (śilā+antas)

• śilā – rock, stone, slab
  noun (feminine)
• antas – interior, inside, within
  indeclinable (neuter)

Note: Used adverbially to indicate location.

इव (iva) - like, as if, as, similar to

(indeclinable)

नीरन्ध्रः (nīrandhraḥ) - without pores/gaps, solid, compact

(adjective)

Nominative, masculine, singular of nīrandhra

nīrandhra - having no interstices, compact, solid, dense, without gaps or holes

Compound type : Bahuvrīhi (nis+randhra)

• nis – without, free from, out of
  indeclinable
  Prefix for negation/absence.
• randhra – hole, opening, gap, pore, defect
  noun (neuter)

Note: Refers to the implied metaphorical subject (e.g., ātman) in masculine nominative.

स्यन्दमानैन्दुबिम्बवत् (syandamānaindubimbavat) - like a flowing moon-orb

(adjective)

Nominative, masculine, singular of syandamānaindubimbavat

syandamānaindubimbavat - resembling a flowing moon-orb

Compound type : Tatpuruṣa (syandamāna+indu+bimba+vat)

• syandamāna – flowing, oozing, dripping, streaming
  adjective
  Present Middle Participle
  Derived from root 'syand' (to flow) with present participle suffix '-māna'.
  Root: syand (class 1)
• indu – moon
  noun (masculine)
• bimba – disc, orb, sphere, reflection
  noun (neuter)
• vat – like, resembling, similar to
  indeclinable
  Suffix indicating similarity.

Note: Used as an adjective agreeing with the implied masculine subject.

रसम् (rasam) - essence, taste, fluid, juice, delight

(noun)

Accusative, masculine, singular of rasa

rasa - sap, juice, fluid, taste, essence, flavor, feeling, aesthetic delight

Note: Object of 'āsvādyam'.

स्वसंविदास्वाद्यम् (svasaṁvidāsvādyam) - to be tasted by one's own consciousness/self-awareness; enjoyable by self-perception

(adjective)

Accusative, masculine, singular of svasaṃvidāsvādya

svasaṁvidāsvādya - that which is to be tasted or enjoyed by one's own consciousness

Compound type : Tatpuruṣa (svasaṃvid+āsvādya)

• sva – own, self
  pronoun
• saṃvid – consciousness, knowledge, understanding, self-awareness (saṃvid)
  noun (feminine)
• āsvādya – to be tasted, fit to be tasted, enjoyable
  adjective
  Gerundive
  Derived from root 'svad' (to taste) with prefix 'ā-' and gerundive suffix '-ya'.
  Prefix: ā
  Root: svad (class 1)

Note: Agrees with 'rasam'.

स्यन्दमानः (syandamānaḥ) - flowing, oozing

(adjective)

Nominative, masculine, singular of syandamāna

syandamāna - flowing, oozing, dripping, streaming, gliding

Present Middle Participle

Derived from root 'syand' (to flow) with present participle suffix '-māna'.

Root: syand (class 1)

Note: Refers to the implied metaphorical subject (e.g., ātman) in masculine nominative.

इव (iva) - like, as if, as, similar to

(indeclinable)

अमृतम् (amṛtam) - nectar, ambrosia, immortality

(noun)

Nominative, neuter, singular of amṛta

amṛta - nectar (of immortality), ambrosia, immortality, imperishable

Note: Used as a nominative complement to 'syandamānaḥ', indicating what it flows like.