Declension table of ?sarpatva

Neuter	Singular	Dual	Plural
Nominative	sarpatvam	sarpatve	sarpatvāni
Vocative	sarpatva	sarpatve	sarpatvāni
Accusative	sarpatvam	sarpatve	sarpatvāni
Instrumental	sarpatvena	sarpatvābhyām	sarpatvaiḥ
Dative	sarpatvāya	sarpatvābhyām	sarpatvebhyaḥ
Ablative	sarpatvāt	sarpatvābhyām	sarpatvebhyaḥ
Genitive	sarpatvasya	sarpatvayoḥ	sarpatvānām
Locative	sarpatve	sarpatvayoḥ	sarpatveṣu

Compound sarpatva -

Adverb -sarpatvam -sarpatvāt