Declension table of ?pīvasa

Neuter	Singular	Dual	Plural
Nominative	pīvasam	pīvase	pīvasāni
Vocative	pīvasa	pīvase	pīvasāni
Accusative	pīvasam	pīvase	pīvasāni
Instrumental	pīvasena	pīvasābhyām	pīvasaiḥ
Dative	pīvasāya	pīvasābhyām	pīvasebhyaḥ
Ablative	pīvasāt	pīvasābhyām	pīvasebhyaḥ
Genitive	pīvasasya	pīvasayoḥ	pīvasānām
Locative	pīvase	pīvasayoḥ	pīvaseṣu

Compound pīvasa -

Adverb -pīvasam -pīvasāt