योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-125, verse-66

शक्रचापे यथा भान्ति नानावर्णा नभोङ्गणे ।
तथा शून्यात्मका एव ब्रह्माण्डपरमाणवः ॥ ६६ ॥

śakracāpe yathā bhānti nānāvarṇā nabhoṅgaṇe ,
tathā śūnyātmakā eva brahmāṇḍaparamāṇavaḥ 66

66. śakracāpe yathā bhānti nānāvarṇāḥ nabhaḥ-aṅgaṇe
tathā śūnyātmakāḥ eva brahmāṇḍa-paramāṇavaḥ

66. yathā nabhaḥ-aṅgaṇe śakracāpe nānāvarṇāḥ bhānti
tathā brahmāṇḍa-paramāṇavaḥ eva śūnyātmakāḥ

66. Just as various colors appear within Indra's bow (rainbow) in the expanse of the sky, so too are the atoms of the universe essentially void.

Words meanings summery:

• शक्रचापे (śakracāpe) - in Indra's bow, in the rainbow

• यथा (yathā) - just as, as

• भान्ति (bhānti) - they shine, they appear

• नानावर्णाः (nānāvarṇāḥ) - various colors, diverse hues

• नभः-अङ्गणे (nabhaḥ-aṅgaṇe) - in the courtyard/expanse of the sky

• तथा (tathā) - similarly, so also

• शून्यात्मकाः (śūnyātmakāḥ) - of void nature, essentially empty, illusory

• एव (eva) - indeed, only, merely

• ब्रह्माण्ड-परमाणवः (brahmāṇḍa-paramāṇavaḥ) - atoms of the universe

Words meanings and morphology

शक्रचापे (śakracāpe) - in Indra's bow, in the rainbow

(noun)

Locative, masculine, singular of śakracāpa

śakracāpa - Indra's bow, rainbow

Compound type : tatpuruṣa (śakra+cāpa)

• śakra – Indra (name of a deity)
  proper noun (masculine)
• cāpa – bow, arch
  noun (masculine)

यथा (yathā) - just as, as

(indeclinable)

Note: Introduces a simile.

भान्ति (bhānti) - they shine, they appear

(verb)

3rd person , plural, active, present (lat) of bhā

Present Tense

3rd person plural, active voice

Root: bhā (class 2)

नानावर्णाः (nānāvarṇāḥ) - various colors, diverse hues

(adjective)

Nominative, masculine, plural of nānāvarṇa

nānāvarṇa - multicolored, various hues

Compound type : bahuvrīhi (nānā+varṇa)

• nānā – various, diverse, manifold
  indeclinable
• varṇa – color, hue, appearance
  noun (masculine)
  Root: vṛ (class 9)

Note: Subject of bhānti.

नभः-अङ्गणे (nabhaḥ-aṅgaṇe) - in the courtyard/expanse of the sky

(noun)

Locative, neuter, singular of nabhaḥ-aṅgaṇa

nabhaḥ-aṅgaṇa - expanse of the sky, sky-region

Compound type : tatpuruṣa (nabhas+aṅgaṇa)

• nabhas – sky, atmosphere, space
  noun (neuter)
• aṅgaṇa – courtyard, open space, expanse
  noun (neuter)

Note: Locative case, refers to the location where the colors appear.

तथा (tathā) - similarly, so also

(indeclinable)

Note: Connects the simile to the main statement.

शून्यात्मकाः (śūnyātmakāḥ) - of void nature, essentially empty, illusory

(adjective)

Nominative, masculine, plural of śūnyātmaka

śūnyātmaka - of the nature of void, essentially empty, illusory

Compound type : bahuvrīhi (śūnya+ātman)

• śūnya – empty, void, non-existent
  adjective (neuter)
  Root: śūny
• ātman – self, soul, essence, nature, spirit
  noun (masculine)

Note: Predicate for brahmāṇḍaparamāṇavaḥ.

एव (eva) - indeed, only, merely

(indeclinable)

Note: Emphasizes the void nature.

ब्रह्माण्ड-परमाणवः (brahmāṇḍa-paramāṇavaḥ) - atoms of the universe

(noun)

Nominative, masculine, plural of brahmāṇḍaparamāṇu

brahmāṇḍaparamāṇu - atom of the universe, cosmic atom

Compound type : tatpuruṣa (brahmāṇḍa+paramāṇu)

• brahmāṇḍa – universe, cosmic egg
  noun (neuter)
• paramāṇu – atom, ultimate particle
  noun (masculine)

Note: Subject of the second clause.