महाभारतः mahābhārataḥ - book-8, chapter-12, verse-15

चन्द्रार्कानिलवह्नीनां कान्तिदीप्तिबलद्युतीः ।
यौ सदा बिभ्रतुर्वीरौ ताविमौ केशवार्जुनौ ॥१५॥

15. candrārkānilavahnīnāṁ kāntidīptibaladyutīḥ ,
yau sadā bibhraturvīrau tāvimau keśavārjunau.

15. candrārkanilavahnīnām kāntidīptibaladyutīḥ
yau sadā bibhratuḥ vīrau tau imau keśavārjunau

15. yau vīrau candrārkanilavahnīnām kāntidīptibaladyutīḥ
sadā bibhratuḥ tau imau keśavārjunau

15. These two heroes, Keśava (Kṛṣṇa) and Arjuna, who always possess the brilliance, luster, strength, and radiance of the moon, the sun, the wind, and fire.

Words meanings summery:

• चन्द्रार्कनिलवह्नीनाम् (candrārkanilavahnīnām) - of the moon, sun, wind, and fire

• कान्तिदीप्तिबलद्युतीः (kāntidīptibaladyutīḥ) - brilliance, luster, strength, and radiance

• यौ (yau) - who (dual)

• सदा (sadā) - always, perpetually

• बिभ्रतुः (bibhratuḥ) - they possess (they (two) bear, carry, maintain, possess)

• वीरौ (vīrau) - two heroes

• तौ (tau) - those two

• इमौ (imau) - these two

• केशवार्जुनौ (keśavārjunau) - Keśava and Arjuna

Words meanings and morphology

चन्द्रार्कनिलवह्नीनाम् (candrārkanilavahnīnām) - of the moon, sun, wind, and fire

(noun)

Genitive, masculine, plural of candrārkanilavahni

candrārkanilavahni - moon, sun, wind, and fire (collectively)

Compound type : dvandva (candra+arka+anila+vahni)

• candra – moon
  noun (masculine)
  From root 'cand' (to shine, be bright)
  Root: cand (class 1)
• arka – sun, ray, praise
  noun (masculine)
  From root 'arc' (to shine, praise)
  Root: arc (class 1)
• anila – wind, air
  noun (masculine)
  From root 'an' (to breathe, live)
  Root: an (class 2)
• vahni – fire; Agni (god of fire); carrier
  noun (masculine)
  From root 'vah' (to carry)
  Root: vah (class 1)

कान्तिदीप्तिबलद्युतीः (kāntidīptibaladyutīḥ) - brilliance, luster, strength, and radiance

(noun)

Accusative, feminine, plural of kāntidīptibaladyuti

kāntidīptibaladyuti - splendor, brilliance, strength, and radiance (collectively)

Compound type : dvandva (kānti+dīpti+bala+dyuti)

• kānti – loveliness, beauty, splendor, brilliance
  noun (feminine)
  From root 'kām' (to desire, shine)
  Root: kām (class 1)
• dīpti – light, luster, splendor, brightness
  noun (feminine)
  From root 'dīp' (to shine, blaze)
  Root: dīp (class 4)
• bala – strength, power, force, might
  noun (neuter)
  Root: bal (class 10)
• dyuti – brightness, splendor, radiance, luster
  noun (feminine)
  From root 'dyut' (to shine)
  Root: dyut (class 1)

यौ (yau) - who (dual)

(pronoun)

Nominative, masculine, dual of yad

yad - who, which, what (relative pronoun)

सदा (sadā) - always, perpetually

(indeclinable)

बिभ्रतुः (bibhratuḥ) - they possess (they (two) bear, carry, maintain, possess)

(verb)

3rd person , dual, active, perfect (Lit) of bhṛ

Perfect Active

3rd person dual perfect active form of the root 'bhṛ'.

Root: bhṛ (class 3)

वीरौ (vīrau) - two heroes

(noun)

Nominative, masculine, dual of vīra

vīra - hero, brave man, warrior

Note: Adjective or noun in apposition to 'yau' and 'tau'.

तौ (tau) - those two

(pronoun)

Nominative, masculine, dual of tad

tad - that, those (demonstrative pronoun)

इमौ (imau) - these two

(pronoun)

Nominative, masculine, dual of idam

idam - this, these (demonstrative pronoun, refers to what is near)

केशवार्जुनौ (keśavārjunau) - Keśava and Arjuna

(proper noun)

Nominative, masculine, dual of keśavārjuna

keśavārjuna - Keśava (Kṛṣṇa) and Arjuna

Compound type : dvandva (keśava+arjuna)

• keśava – having long hair; an epithet of Viṣṇu or Kṛṣṇa
  proper noun (masculine)
• arjuna – white, clear; a name of the Pāṇḍava prince Arjuna
  proper noun (masculine)

Note: In apposition to 'tau imau vīrau'.