Declension table of ?aruṇatva

Neuter	Singular	Dual	Plural
Nominative	aruṇatvam	aruṇatve	aruṇatvāni
Vocative	aruṇatva	aruṇatve	aruṇatvāni
Accusative	aruṇatvam	aruṇatve	aruṇatvāni
Instrumental	aruṇatvena	aruṇatvābhyām	aruṇatvaiḥ
Dative	aruṇatvāya	aruṇatvābhyām	aruṇatvebhyaḥ
Ablative	aruṇatvāt	aruṇatvābhyām	aruṇatvebhyaḥ
Genitive	aruṇatvasya	aruṇatvayoḥ	aruṇatvānām
Locative	aruṇatve	aruṇatvayoḥ	aruṇatveṣu

Compound aruṇatva -

Adverb -aruṇatvam -aruṇatvāt