महाभारतः mahābhārataḥ - book-3, chapter-262, verse-36

प्रपतेद्द्यौः सनक्षत्रा पृथिवी शकलीभवेत् ।
शैत्यमग्निरियान्नाहं त्यजेयं रघुनन्दनम् ॥३६॥

36. prapateddyauḥ sanakṣatrā pṛthivī śakalībhavet ,
śaityamagniriyānnāhaṁ tyajeyaṁ raghunandanam.

36. prapatet dyauḥ sanakṣatrā pṛthivī śakalībhavet
śaityam agniḥ iyāt na aham tyajeyam raghunandanam

36. Even if the star-studded sky were to fall, the earth were to break into fragments, and fire were to become cold, I would not abandon Rāma (raghunandana).

Words meanings summery:

• प्रपतेत् (prapatet) - should fall down, would fall down

• द्यौः (dyauḥ) - sky, heaven

• सनक्षत्रा (sanakṣatrā) - with its stars, accompanied by stars

• पृथिवी (pṛthivī) - earth

• शकलीभवेत् (śakalībhavet) - should become fragments, would be shattered

• शैत्यम् (śaityam) - coldness, cold

• अग्निः (agniḥ) - fire

• इयात् (iyāt) - should attain (coldness) (should go, would go, should reach)

• न (na) - not, no

• अहम् (aham) - I

• त्यजेयम् (tyajeyam) - I would abandon, I should abandon

• रघुनन्दनम् (raghunandanam) - Rāma (the delight of the Raghu dynasty, descendant of Raghu)

Words meanings and morphology

प्रपतेत् (prapatet) - should fall down, would fall down

(verb)

3rd person , singular, active, optative (vidhiliṅ) of pra-pat

Prefix: pra

Root: pat (class 1)

द्यौः (dyauḥ) - sky, heaven

(noun)

Nominative, feminine, singular of dyu

dyu - sky, heaven, day

सनक्षत्रा (sanakṣatrā) - with its stars, accompanied by stars

(adjective)

Nominative, feminine, singular of sanakṣatra

sanakṣatra - accompanied by stars, with its constellations

Compound type : bahuvrihi (sa+nakṣatra)

• sa – with, accompanied by
  indeclinable
• nakṣatra – star, constellation
  noun (neuter)

Note: Qualifies 'dyauḥ'.

पृथिवी (pṛthivī) - earth

(noun)

Nominative, feminine, singular of pṛthivī

pṛthivī - earth, ground

शकलीभवेत् (śakalībhavet) - should become fragments, would be shattered

(verb)

3rd person , singular, active, optative (vidhiliṅ) of śakalībhū

Denominative verb formed from śakala (fragment) by adding -ī and then root bhū (to become).

Root: bhū (class 1)

शैत्यम् (śaityam) - coldness, cold

(noun)

Nominative, neuter, singular of śaitya

śaitya - coldness, chill; cold (adjective)

Derived from śīta (cold) + suffix ya

अग्निः (agniḥ) - fire

(noun)

Nominative, masculine, singular of agni

agni - fire, god of fire

इयात् (iyāt) - should attain (coldness) (should go, would go, should reach)

(verb)

3rd person , singular, active, optative (vidhiliṅ) of i

Root: i (class 2)

न (na) - not, no

(indeclinable)

अहम् (aham) - I

(pronoun)

Nominative, singular of asmad

asmad - I, we (1st person pronoun)

त्यजेयम् (tyajeyam) - I would abandon, I should abandon

(verb)

1st person , singular, active, optative (vidhiliṅ) of tyaj

Root: tyaj (class 1)

रघुनन्दनम् (raghunandanam) - Rāma (the delight of the Raghu dynasty, descendant of Raghu)

(proper noun)

Accusative, masculine, singular of raghunandana

raghunandana - delight of the Raghus, descendant of Raghu (epithet for Rāma)

Compound type : tatpurusha (raghu+nandana)

• raghu – Raghu (name of a king, ancestor of Rāma)
  proper noun (masculine)
• nandana – son, child; delighting, gladdening
  noun (masculine)
  Root: nand (class 1)