Declension table of ?pīvasa

Masculine	Singular	Dual	Plural
Nominative	pīvasaḥ	pīvasau	pīvasāḥ
Vocative	pīvasa	pīvasau	pīvasāḥ
Accusative	pīvasam	pīvasau	pīvasān
Instrumental	pīvasena	pīvasābhyām	pīvasaiḥ pīvasebhiḥ
Dative	pīvasāya	pīvasābhyām	pīvasebhyaḥ
Ablative	pīvasāt	pīvasābhyām	pīvasebhyaḥ
Genitive	pīvasasya	pīvasayoḥ	pīvasānām
Locative	pīvase	pīvasayoḥ	pīvaseṣu

Compound pīvasa -

Adverb -pīvasam -pīvasāt