Declension table of ?viṣatva

Neuter	Singular	Dual	Plural
Nominative	viṣatvam	viṣatve	viṣatvāni
Vocative	viṣatva	viṣatve	viṣatvāni
Accusative	viṣatvam	viṣatve	viṣatvāni
Instrumental	viṣatvena	viṣatvābhyām	viṣatvaiḥ
Dative	viṣatvāya	viṣatvābhyām	viṣatvebhyaḥ
Ablative	viṣatvāt	viṣatvābhyām	viṣatvebhyaḥ
Genitive	viṣatvasya	viṣatvayoḥ	viṣatvānām
Locative	viṣatve	viṣatvayoḥ	viṣatveṣu

Compound viṣatva -

Adverb -viṣatvam -viṣatvāt