Declension table of ?pratyarthitva

Neuter	Singular	Dual	Plural
Nominative	pratyarthitvam	pratyarthitve	pratyarthitvāni
Vocative	pratyarthitva	pratyarthitve	pratyarthitvāni
Accusative	pratyarthitvam	pratyarthitve	pratyarthitvāni
Instrumental	pratyarthitvena	pratyarthitvābhyām	pratyarthitvaiḥ
Dative	pratyarthitvāya	pratyarthitvābhyām	pratyarthitvebhyaḥ
Ablative	pratyarthitvāt	pratyarthitvābhyām	pratyarthitvebhyaḥ
Genitive	pratyarthitvasya	pratyarthitvayoḥ	pratyarthitvānām
Locative	pratyarthitve	pratyarthitvayoḥ	pratyarthitveṣu

Compound pratyarthitva -

Adverb -pratyarthitvam -pratyarthitvāt