महाभारतः mahābhārataḥ - book-1, chapter-83, verse-7

कस्त्वं युवा वासवतुल्यरूपः स्वतेजसा दीप्यमानो यथाग्निः ।
पतस्युदीर्णाम्बुधरान्धकारात्खात्खेचराणां प्रवरो यथार्कः ॥७॥

7. kastvaṁ yuvā vāsavatulyarūpaḥ; svatejasā dīpyamāno yathāgniḥ ,
patasyudīrṇāmbudharāndhakārā;tkhātkhecarāṇāṁ pravaro yathārkaḥ.

7. kaḥ tvam yuvā vāsavatulyarūpaḥ
svatejasā dīpyamānaḥ yathā agniḥ
patasi udīrṇāmbudharāndhakārāt
khāt khecarāṇām pravaraḥ yathā arkaḥ

7. Who are you, young man, whose form resembles Indra, shining with your own splendor like fire? You are falling from the sky, which is darkened by surging clouds, like the sun, the foremost among celestial beings.

Words meanings summery:

• कः (kaḥ) - who

• त्वम् (tvam) - you

• युवा (yuvā) - young man

• वासवतुल्यरूपः (vāsavatulyarūpaḥ) - having a form like Vasava (Indra)

• स्वतेजसा (svatejasā) - by your own splendor

• दीप्यमानः (dīpyamānaḥ) - shining, glowing

• यथा (yathā) - like, as

• अग्निः (agniḥ) - fire

• पतसि (patasi) - you fall

• उदीर्णाम्बुधरान्धकारात् (udīrṇāmbudharāndhakārāt) - from the darkness of surging clouds

• खात् (khāt) - from the sky

• खेचराणाम् (khecarāṇām) - of the sky-dwellers, of celestial beings

• प्रवरः (pravaraḥ) - foremost, chief, best

• यथा (yathā) - like, as

• अर्कः (arkaḥ) - sun

Words meanings and morphology

कः (kaḥ) - who

(pronoun)

Nominative, masculine, singular of kim

kim - who, what, which

त्वम् (tvam) - you

(pronoun)

Nominative, masculine, singular of yusmad

yusmad - you

Note: Refers to Yayati, who is masculine.

युवा (yuvā) - young man

(noun)

Nominative, masculine, singular of yuvan

yuvan - young, youth, young man

वासवतुल्यरूपः (vāsavatulyarūpaḥ) - having a form like Vasava (Indra)

(adjective)

Nominative, masculine, singular of vāsavatulyarūpa

vāsavatulyarūpa - having a form similar to Vasava (Indra)

Compound type : bahuvrīhi (vāsava+tulya+rūpa)

• vāsava – Indra (son of Vasu)
  proper noun (masculine)
• tulya – similar, equal, like
  adjective
• rūpa – form, appearance, shape
  noun (neuter)

स्वतेजसा (svatejasā) - by your own splendor

(noun)

Instrumental, neuter, singular of svatejas

svatejas - one's own splendor/brilliance

Compound type : tatpurusha (sva+tejas)

• sva – own, one's own
  adjective
• tejas – splendor, brilliance, energy
  noun (neuter)

दीप्यमानः (dīpyamānaḥ) - shining, glowing

(adjective)

Nominative, masculine, singular of dīpyamāna

dīpyamāna - shining, blazing, illustrious

Present Middle Participle

Root: dīp (class 4)

यथा (yathā) - like, as

(indeclinable)

अग्निः (agniḥ) - fire

(noun)

Nominative, masculine, singular of agni

agni - fire, god of fire

पतसि (patasi) - you fall

(verb)

2nd person , singular, active, present (laṭ) of pat

Root: pat (class 1)

उदीर्णाम्बुधरान्धकारात् (udīrṇāmbudharāndhakārāt) - from the darkness of surging clouds

(noun)

Ablative, masculine, singular of udīrṇāmbudharāndhakāra

udīrṇāmbudharāndhakāra - darkness from surging clouds

Compound type : tatpurusha (udīrṇa+ambudhara+andhakāra)

• udīrṇa – raised, surging, agitated
  adjective
  Past Passive Participle
  Prefix: ud
  Root: īr (class 1)
• ambudhara – cloud (water-bearer)
  noun (masculine)
  Agent Noun
  Root: dhṛ (class 1)
• andhakāra – darkness
  noun (masculine)

खात् (khāt) - from the sky

(noun)

Ablative, neuter, singular of kha

kha - sky, ether, space

खेचराणाम् (khecarāṇām) - of the sky-dwellers, of celestial beings

(noun)

Genitive, masculine, plural of khecara

khecara - moving in the air, a celestial being, bird

Compound type : tatpurusha (kha+cara)

• kha – sky, ether, space
  noun (neuter)
• cara – moving, going, dweller
  adjective
  Agent Noun
  Root: car (class 1)

प्रवरः (pravaraḥ) - foremost, chief, best

(adjective)

Nominative, masculine, singular of pravara

pravara - excellent, chief, best, superior

यथा (yathā) - like, as

(indeclinable)

अर्कः (arkaḥ) - sun

(noun)

Nominative, masculine, singular of arka

arka - sun, ray, fire