महाभारतः mahābhārataḥ - book-5, chapter-16, verse-34

वैवस्वतं पितॄणां च वरुणं चाप्यपां तथा ।
आधिपत्यं ददौ शक्रः सत्कृत्य वरदस्तदा ॥३४॥

34. vaivasvataṁ pitṝṇāṁ ca varuṇaṁ cāpyapāṁ tathā ,
ādhipatyaṁ dadau śakraḥ satkṛtya varadastadā.

34. vaivasvatam pitṝṇām ca varuṇam ca api apām tathā
ādhipatyam dadau śakraḥ satkṛtya varadaḥ tadā

34. Having thus pondered, the divine Mahendra, the slayer of Pāka, then, as the bestower of boons, having honored them, bestowed upon Kubera the sovereignty (ādhipatyam) over all Yakṣas and wealth, similarly upon Vaivasvata (Yama) sovereignty over the ancestors (Pitṛs), and also upon Varuna sovereignty over the waters.

Words meanings summery:

• वैवस्वतम् (vaivasvatam) - Yama, the god of death, known as Vaivasvata, son of the sun-god Vivasvat (Vaivasvata (Yama), son of Vivasvat)

• पितॄणाम् (pitṝṇām) - of the ancestors, of the fathers (Pitṛs)

• च (ca) - and, also

• वरुणम् (varuṇam) - Varuna, god of waters

• च (ca) - and, also

• अपि (api) - also, even

• अपाम् (apām) - of waters

• तथा (tathā) - thus, so, similarly

• आधिपत्यम् (ādhipatyam) - sovereignty, dominion, overlordship

• ददौ (dadau) - gave, bestowed

• शक्रः (śakraḥ) - Indra

• सत्कृत्य (satkṛtya) - having honored, having shown respect

• वरदः (varadaḥ) - bestower of boons

• तदा (tadā) - then, at that time

Words meanings and morphology

वैवस्वतम् (vaivasvatam) - Yama, the god of death, known as Vaivasvata, son of the sun-god Vivasvat (Vaivasvata (Yama), son of Vivasvat)

(proper noun)

Accusative, masculine, singular of vaivasvata

vaivasvata - Vaivasvata (an epithet of Yama, Manu, and others as offspring of Vivasvat)

Taddhita derivation from Vivasvat.

पितॄणाम् (pitṝṇām) - of the ancestors, of the fathers (Pitṛs)

(noun)

Genitive, masculine, plural of pitṛ

pitṛ - father, ancestor, (plural) the Manes or ancestral spirits (Pitṛs)

च (ca) - and, also

(indeclinable)

वरुणम् (varuṇam) - Varuna, god of waters

(proper noun)

Accusative, masculine, singular of varuṇa

varuṇa - Varuna, god of the oceans, cosmic order, and justice

च (ca) - and, also

(indeclinable)

अपि (api) - also, even

(indeclinable)

अपाम् (apām) - of waters

(noun)

Genitive, feminine, plural of ap

ap - water

तथा (tathā) - thus, so, similarly

(indeclinable)

आधिपत्यम् (ādhipatyam) - sovereignty, dominion, overlordship

(noun)

Accusative, neuter, singular of ādhipatya

ādhipatya - sovereignty, dominion, supremacy, overlordship

Derived as an abstract noun from 'adhipati' (lord, master) with the suffix -ya.

ददौ (dadau) - gave, bestowed

(verb)

3rd person , singular, active, perfect (liṭ) of dā

Root: dā (class 3)

शक्रः (śakraḥ) - Indra

(proper noun)

Nominative, masculine, singular of śakra

śakra - Indra, powerful, mighty

सत्कृत्य (satkṛtya) - having honored, having shown respect

(indeclinable)

Prefix: sat

Root: kṛ (class 8)

Note: Gerund (absolutive) form with prefix sat.

वरदः (varadaḥ) - bestower of boons

(adjective)

Nominative, masculine, singular of varada

varada - granting wishes, bestowing boons, boon-giver

Compound type : tatpuruṣa (vara+da)

• vara – boon, blessing, wish, excellent, choicest
  noun (masculine)
• da – giving, bestowing, a giver
  adjective (masculine)
  Suffix -da from root dā.
  Root: dā (class 3)

तदा (tadā) - then, at that time

(indeclinable)