योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-71, verse-39

हा मुखेन्दो तपसि किं नाद्य त्वं मम रश्मिभिः ।
कल्पान्तदावसंशान्तचन्द्रबिम्बमनोहर ॥ ३९ ॥

hā mukhendo tapasi kiṃ nādya tvaṃ mama raśmibhiḥ ,
kalpāntadāvasaṃśāntacandrabimbamanohara 39

39. hā mukhendo tapasi kim na adya tvaṃ mama
raśmibhiḥ kalpāntadāvasaṃśāntacandrabimbamanohara

39. hā mukhendo kalpāntadāvasaṃśāntacandrabimbamanohara
kim adya tvam mama raśmibhiḥ tapasi na

39. Alas, O moon-face, (you who were once) charming like the moon disc completely extinguished by the cosmic conflagration at the end of a world-cycle (kalpa)! Why today do you not radiate brilliance (tapas) for me with your rays?

Words meanings summery:

• हा (hā) - alas!, ah!

• मुखेन्दो (mukhendo) - O moon-face

• तपसि (tapasi) - in radiance or shining, referring to the face's former glow. (in heat, in brilliance, in radiance, in austerity)

• किम् (kim) - why, indicating a question of lamentation. (what, why, how)

• न (na) - not

• अद्य (adya) - today, now

• त्वं (tvaṁ) - you

• मम (mama) - my, to me, for me

• रश्मिभिः (raśmibhiḥ) - by rays, with rays

• कल्पान्तदावसंशान्तचन्द्रबिम्बमनोहर (kalpāntadāvasaṁśāntacandrabimbamanohara) - charming like the moon disc completely extinguished by the cosmic conflagration at the end of a world-cycle

Words meanings and morphology

हा (hā) - alas!, ah!

(indeclinable)

मुखेन्दो (mukhendo) - O moon-face

(noun)

Vocative, masculine, singular of mukhendu

mukhendu - moon-face

Compound type : tatpuruṣa (mukha+indu)

• mukha – mouth, face, principal part
  noun (neuter)
• indu – moon, drop
  noun (masculine)

तपसि (tapasi) - in radiance or shining, referring to the face's former glow. (in heat, in brilliance, in radiance, in austerity)

(noun)

Locative, neuter, singular of tapas

tapas - heat, brilliance, radiance, austerity (tapas)

किम् (kim) - why, indicating a question of lamentation. (what, why, how)

(indeclinable)

Note: Used as an interrogative adverb.

न (na) - not

(indeclinable)

अद्य (adya) - today, now

(indeclinable)

त्वं (tvaṁ) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

मम (mama) - my, to me, for me

(pronoun)

singular of mad

mad - I, me

रश्मिभिः (raśmibhiḥ) - by rays, with rays

(noun)

Instrumental, masculine, plural of raśmi

raśmi - ray (of light), rein, rope

कल्पान्तदावसंशान्तचन्द्रबिम्बमनोहर (kalpāntadāvasaṁśāntacandrabimbamanohara) - charming like the moon disc completely extinguished by the cosmic conflagration at the end of a world-cycle

(adjective)

Vocative, masculine, singular of kalpāntadāvasaṃśāntacandrabimbamanohara

kalpāntadāvasaṁśāntacandrabimbamanohara - charming like the moon disc completely extinguished by the cosmic conflagration at the end of a world-cycle

Compound type : bahuvrīhi (kalpānta+dāva+saṃśānta+candrabimba+manohara)

• kalpānta – end of a world-cycle (kalpa)
  noun (masculine)
• dāva – forest fire, conflagration
  noun (masculine)
• saṃśānta – completely calmed, extinguished, pacified
  adjective (masculine)
  Past Passive Participle
  Derived from root √śam (to be calm, cease) with upasarga saṃ-.
  Prefix: sam
  Root: śam (class 4)
• candrabimba – moon disc, orb of the moon
  noun (neuter)
• manohara – charming, beautiful, captivating, enchanting
  adjective (masculine)
  From manas (mind) + √hṛ (to seize, take away).
  Root: hṛ (class 1)

Note: Agreeing with 'mukhendo'.