योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-45, verse-40

रत्नकाञ्चनकान्तोऽसावाददे चित्तमाततम् ।
संध्याभ्रतारेन्दुनदीव्याप्तं मेरुरिवाम्बरम् ॥ ४० ॥

ratnakāñcanakānto'sāvādade cittamātatam ,
saṃdhyābhratārendunadīvyāptaṃ merurivāmbaram 40

40. ratna-kāñcana-kāntaḥ asau ādadhe cittam ātatam
sandhyā-abhra-tārā-indu-nadī-vyāptam meruḥ iva ambaram

40. ratna-kāñcana-kāntaḥ asau meruḥ iva
sandhyā-abhra-tārā-indu-nadī-vyāptam ambaram ātatam cittam ādadhe

40. Resplendent with jewels and gold, he captivated the vast expanse of the mind, just as Mount Meru encompasses the sky, which is filled with twilight clouds, stars, the moon, and rivers.

Words meanings summery:

• रत्न-काञ्चन-कान्तः (ratna-kāñcana-kāntaḥ) - resplendent with jewels and gold (beautiful/shining with jewels and gold)

• असौ (asau) - he (the adorned man) (he, that (person))

• आदधे (ādadhe) - he captivated (he took, he placed, he held, he assumed)

• चित्तम् (cittam) - mind, attention (mind, thought, consciousness, heart)

• आततम् (ātatam) - vast expanse (expanded, vast, stretched, pervaded)

• सन्ध्या-अभ्र-तारा-इन्दु-नदी-व्याप्तम् (sandhyā-abhra-tārā-indu-nadī-vyāptam) - filled with twilight clouds, stars, the moon, and rivers (pervaded by twilight clouds, stars, moon, and rivers)

• मेरुः (meruḥ) - Mount Meru (Mount Meru (mythical golden mountain))

• इव (iva) - like, as, as if

• अम्बरम् (ambaram) - the sky (sky, atmosphere, garment)

Words meanings and morphology

रत्न-काञ्चन-कान्तः (ratna-kāñcana-kāntaḥ) - resplendent with jewels and gold (beautiful/shining with jewels and gold)

(adjective)

Nominative, masculine, singular of ratna-kāñcana-kānta

ratna-kāñcana-kānta - radiant or beautiful with jewels and gold

Compound adjective.

Compound type : tatpuruṣa (ratna+kāñcana+kānta)

• ratna – jewel, gem
  noun (neuter)
  Root: ram (class 1)
• kāñcana – gold, golden
  noun (neuter)
  Derived from kāñca (to shine).
  Root: kāñc (class 1)
• kānta – beautiful, lovely, desired, shining
  adjective
  Past Passive Participle
  From root kam (to desire, love). Used here in the sense of shining/beautiful.
  Root: kam (class 1)

Note: Adjective modifying asau.

असौ (asau) - he (the adorned man) (he, that (person))

(pronoun)

Nominative, masculine, singular of adas

adas - that, this, he, she, it

Demonstrative pronoun.

Note: Subject of ādadhe.

आदधे (ādadhe) - he captivated (he took, he placed, he held, he assumed)

(verb)

3rd person , singular, middle, perfect (lit) of ā-dhā

From root dhā (to place, hold) with prefix ā.

Prefix: ā

Root: dhā (class 3)

चित्तम् (cittam) - mind, attention (mind, thought, consciousness, heart)

(noun)

Accusative, neuter, singular of citta

citta - mind, thought, consciousness, heart

Past Passive Participle (from cit, to perceive), used as a noun

From root cit (to perceive, know, think).

Root: cit (class 1)

Note: Object of ādadhe.

आततम् (ātatam) - vast expanse (expanded, vast, stretched, pervaded)

(adjective)

Accusative, neuter, singular of ā-tata

ā-tata - expanded, vast, stretched, pervaded

Past Passive Participle

From root tan (to stretch) with prefix ā.

Prefix: ā

Root: tan (class 8)

सन्ध्या-अभ्र-तारा-इन्दु-नदी-व्याप्तम् (sandhyā-abhra-tārā-indu-nadī-vyāptam) - filled with twilight clouds, stars, the moon, and rivers (pervaded by twilight clouds, stars, moon, and rivers)

(adjective)

Accusative, neuter, singular of sandhyā-abhra-tārā-indu-nadī-vyāpta

sandhyā-abhra-tārā-indu-nadī-vyāpta - pervaded by (elements of) twilight, clouds, stars, moon, and rivers

Past Passive Participle (compound of nouns and vyāpta)

Compound adjective, modifying ambaram. sandhyā-abhra-tārā-indu-nadī is a dvandva compound acting as the subject of vyāpta. So, a tṛtīyā-tatpuruṣa ending in a P.P.P.

Compound type : tatpuruṣa (sandhyā+abhra+tārā+indu+nadī+vyāpta)

• sandhyā – twilight, evening, junction
  noun (feminine)
• abhra – cloud, sky
  noun (neuter)
• tārā – star
  noun (feminine)
• indu – moon, drop
  noun (masculine)
• nadī – river
  noun (feminine)
• vyāpta – pervaded, filled, occupied
  adjective
  Past Passive Participle
  From root āp (to obtain, reach) with prefix vi.
  Prefixes: vi+ā
  Root: āp (class 5)

Note: Adjective modifying ambaram.

मेरुः (meruḥ) - Mount Meru (Mount Meru (mythical golden mountain))

(proper noun)

Nominative, masculine, singular of meru

meru - Mount Meru (a mythical golden mountain, center of the universe)

Note: Subject in the simile.

इव (iva) - like, as, as if

(indeclinable)

अम्बरम् (ambaram) - the sky (sky, atmosphere, garment)

(noun)

Accusative, neuter, singular of ambara

ambara - sky, atmosphere, cloth, garment

Note: Object in the simile.