Declension table of ?upādānatva

Neuter	Singular	Dual	Plural
Nominative	upādānatvam	upādānatve	upādānatvāni
Vocative	upādānatva	upādānatve	upādānatvāni
Accusative	upādānatvam	upādānatve	upādānatvāni
Instrumental	upādānatvena	upādānatvābhyām	upādānatvaiḥ
Dative	upādānatvāya	upādānatvābhyām	upādānatvebhyaḥ
Ablative	upādānatvāt	upādānatvābhyām	upādānatvebhyaḥ
Genitive	upādānatvasya	upādānatvayoḥ	upādānatvānām
Locative	upādānatve	upādānatvayoḥ	upādānatveṣu

Compound upādānatva -

Adverb -upādānatvam -upādānatvāt