Declension table of ?preyastva

Neuter	Singular	Dual	Plural
Nominative	preyastvam	preyastve	preyastvāni
Vocative	preyastva	preyastve	preyastvāni
Accusative	preyastvam	preyastve	preyastvāni
Instrumental	preyastvena	preyastvābhyām	preyastvaiḥ
Dative	preyastvāya	preyastvābhyām	preyastvebhyaḥ
Ablative	preyastvāt	preyastvābhyām	preyastvebhyaḥ
Genitive	preyastvasya	preyastvayoḥ	preyastvānām
Locative	preyastve	preyastvayoḥ	preyastveṣu

Compound preyastva -

Adverb -preyastvam -preyastvāt