महाभारतः mahābhārataḥ - book-4, chapter-51, verse-12

अलम्बुसोग्रसेनस्य गन्धर्वस्य च तुम्बुरोः ।
यथाभागं यथोद्देशं विमानानि चकाशिरे ॥१२॥

12. alambusograsenasya gandharvasya ca tumburoḥ ,
yathābhāgaṁ yathoddeśaṁ vimānāni cakāśire.

12. alambuṣaugrasenasya gandharvasya ca tumburoḥ
yathābhāgam yathoddeśam vimānāni cakāśire

12. The aerial chariots (vimānas) of Alambuṣa and Ugrasena, and of the gandharva Tumburu, shone according to their respective shares and designated places.

Words meanings summery:

• अलम्बुषौग्रसेनस्य (alambuṣaugrasenasya) - of the celestial beings Alambuṣa and Ugrasena (of Alambuṣa and Ugrasena)

• गन्धर्वस्य (gandharvasya) - of the class of celestial musicians (gandharvas) (of the gandharva)

• च (ca) - and

• तुम्बुरोः (tumburoḥ) - of the gandharva Tumburu (of Tumburu (a gandharva))

• यथाभागम् (yathābhāgam) - according to their respective shares/positions (according to one's share, proportionately, appropriately)

• यथोद्देशम् (yathoddeśam) - according to their designated places (according to direction, according to place, as intended)

• विमानानि (vimānāni) - aerial chariots (vimānas) (aerial chariots, celestial palaces)

• चकाशिरे (cakāśire) - they shone brilliantly (they shone, they appeared)

Words meanings and morphology

अलम्बुषौग्रसेनस्य (alambuṣaugrasenasya) - of the celestial beings Alambuṣa and Ugrasena (of Alambuṣa and Ugrasena)

(compound)

Compound type : dvandva (alambuṣa+ugrasena)

• alambuṣa – Alambuṣa (a proper name, often a Nāga or Gandharva)
  proper noun (masculine)
• ugrasena – Ugrasena (a proper name, often a king)
  proper noun (masculine)

Note: A dvandva compound of two proper names, declined in the genitive singular, referring to both.

गन्धर्वस्य (gandharvasya) - of the class of celestial musicians (gandharvas) (of the gandharva)

(noun)

Genitive, masculine, singular of gandharva

gandharva - a celestial musician or demigod, a class of such beings

Note: Qualifies Tumburu as belonging to the gandharva class.

च (ca) - and

(indeclinable)

Note: Connects Alambuṣa-Ugrasena and Tumburu.

तुम्बुरोः (tumburoḥ) - of the gandharva Tumburu (of Tumburu (a gandharva))

(proper noun)

Genitive, masculine, singular of tumburu

tumburu - Tumburu (a famous Gandharva)

यथाभागम् (yathābhāgam) - according to their respective shares/positions (according to one's share, proportionately, appropriately)

(indeclinable)

Avyayībhāva compound from yathā (as, according to) and bhāga (share, portion)

Compound type : avyayībhāva (yathā+bhāga)

• yathā – as, according to
  indeclinable
• bhāga – share, portion, part
  noun (masculine)

Note: An avyayībhāva compound acting as an adverb.

यथोद्देशम् (yathoddeśam) - according to their designated places (according to direction, according to place, as intended)

(indeclinable)

Avyayībhāva compound from yathā (as, according to) and uddeśa (direction, place, mention)

Compound type : avyayībhāva (yathā+uddeśa)

• yathā – as, according to
  indeclinable
• uddeśa – mention, indication, designated place
  noun (masculine)

Note: An avyayībhāva compound acting as an adverb. The 'o' in 'yathoddeśam' is a result of internal sandhi (ā + u = o).

विमानानि (vimānāni) - aerial chariots (vimānas) (aerial chariots, celestial palaces)

(noun)

Nominative, neuter, plural of vimāna

vimāna - aerial chariot, celestial car, temple, palace

Note: Subject of cakāśire.

चकाशिरे (cakāśire) - they shone brilliantly (they shone, they appeared)

(verb)

3rd person , plural, middle, perfect (liṭ) of kāś

Perfect

Root kāś, 3rd plural, ātmanepada

Root: kāś (class 1)

Note: Perfect tense, 3rd person plural, middle voice (ātmanepada) of the root √kāś (to shine).