वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-1, chapter-33, verse-16

शनैर्वियुज्यते संध्या नभो नेत्रैरिवावृतम् ।
नक्षत्रतारागहनं ज्योतिर्भिरवभासते ॥१६॥

16. śanairviyujyate saṃdhyā nabho netrairivāvṛtam ,
nakṣatratārāgahanaṃ jyotirbhiravabhāsate.

16. śanaiḥ viyujyate saṃdhyā nabhaḥ netraiḥ iva
āvṛtam nakṣatratārāgahanaṃ jyotibhiḥ avabhāsate

16. saṃdhyā śanaiḥ viyujyate netraiḥ iva āvṛtam
nakṣatratārāgahanaṃ nabhaḥ jyotibhiḥ avabhāsate

16. Slowly, the twilight (saṃdhyā) departs. The sky, covered as if with countless eyes, dense with constellations and stars, shines brightly with its luminaries.

Words meanings summery:

• शनैः (śanaiḥ) - slowly, gradually

• वियुज्यते (viyujyate) - departs, is separated, is disunited

• संध्या (saṁdhyā) - twilight, evening, junction (of day and night)

• नभः (nabhaḥ) - sky, atmosphere

• नेत्रैः (netraiḥ) - by the stars (metaphorical eyes of the sky) (by eyes)

• इव (iva) - like, as if, as

• आवृतम् (āvṛtam) - covered, enveloped

• नक्षत्रतारागहनं (nakṣatratārāgahanaṁ) - dense with constellations and stars

• ज्योतिभिः (jyotibhiḥ) - by lights, by luminaries

• अवभासते (avabhāsate) - shines, appears

Words meanings and morphology

शनैः (śanaiḥ) - slowly, gradually

(indeclinable)

वियुज्यते (viyujyate) - departs, is separated, is disunited

(verb)

3rd person , singular, middle, present (laṭ) of vi-yuj

3rd person singular present middle voice

Prefix: vi

Root: yuj (class 7)

संध्या (saṁdhyā) - twilight, evening, junction (of day and night)

(noun)

Nominative, feminine, singular of saṃdhyā

saṁdhyā - twilight, dawn, dusk, juncture

Prefix: sam

Root: dhā (class 3)

नभः (nabhaḥ) - sky, atmosphere

(noun)

Nominative, neuter, singular of nabhas

nabhas - sky, atmosphere, cloud

Note: Refers to the sky.

नेत्रैः (netraiḥ) - by the stars (metaphorical eyes of the sky) (by eyes)

(noun)

Instrumental, neuter, plural of netra

netra - eye, leader

Root: nī (class 1)

Note: Here, refers metaphorically to stars.

इव (iva) - like, as if, as

(indeclinable)

आवृतम् (āvṛtam) - covered, enveloped

(adjective)

Nominative, neuter, singular of āvṛta

āvṛta - covered, enveloped, surrounded

Past Passive Participle

derived from ā-vṛ (to cover, surround) + kta

Prefix: ā

Root: vṛ (class 5)

नक्षत्रतारागहनं (nakṣatratārāgahanaṁ) - dense with constellations and stars

(adjective)

Nominative, neuter, singular of nakṣatratārāgahana

nakṣatratārāgahana - dense with constellations and stars

Compound type : Bahuvrihi (nakṣatra+tārā+gahana)

• nakṣatra – constellation, star, asterism
  noun (neuter)
• tārā – star, pupil of the eye
  noun (feminine)
  Root: tṛ
• gahana – dense, deep, thicket, impervious
  adjective (neuter)
  Root: gah

Note: Agrees with nabhaḥ.

ज्योतिभिः (jyotibhiḥ) - by lights, by luminaries

(noun)

Instrumental, neuter, plural of jyotis

jyotis - light, luster, star

Root: dyut

अवभासते (avabhāsate) - shines, appears

(verb)

3rd person , singular, middle, present (laṭ) of ava-bhās

3rd person singular present middle voice

Prefix: ava

Root: bhās (class 1)