Declension table of apūrvatva

Neuter	Singular	Dual	Plural
Nominative	apūrvatvam	apūrvatve	apūrvatvāni
Vocative	apūrvatva	apūrvatve	apūrvatvāni
Accusative	apūrvatvam	apūrvatve	apūrvatvāni
Instrumental	apūrvatvena	apūrvatvābhyām	apūrvatvaiḥ
Dative	apūrvatvāya	apūrvatvābhyām	apūrvatvebhyaḥ
Ablative	apūrvatvāt	apūrvatvābhyām	apūrvatvebhyaḥ
Genitive	apūrvatvasya	apūrvatvayoḥ	apūrvatvānām
Locative	apūrvatve	apūrvatvayoḥ	apūrvatveṣu

Compound apūrvatva -

Adverb -apūrvatvam -apūrvatvāt