Declension table of ?vidheyatva

Neuter	Singular	Dual	Plural
Nominative	vidheyatvam	vidheyatve	vidheyatvāni
Vocative	vidheyatva	vidheyatve	vidheyatvāni
Accusative	vidheyatvam	vidheyatve	vidheyatvāni
Instrumental	vidheyatvena	vidheyatvābhyām	vidheyatvaiḥ
Dative	vidheyatvāya	vidheyatvābhyām	vidheyatvebhyaḥ
Ablative	vidheyatvāt	vidheyatvābhyām	vidheyatvebhyaḥ
Genitive	vidheyatvasya	vidheyatvayoḥ	vidheyatvānām
Locative	vidheyatve	vidheyatvayoḥ	vidheyatveṣu

Compound vidheyatva -

Adverb -vidheyatvam -vidheyatvāt