Declension table of ?padva

Neuter	Singular	Dual	Plural
Nominative	padvam	padve	padvāni
Vocative	padva	padve	padvāni
Accusative	padvam	padve	padvāni
Instrumental	padvena	padvābhyām	padvaiḥ
Dative	padvāya	padvābhyām	padvebhyaḥ
Ablative	padvāt	padvābhyām	padvebhyaḥ
Genitive	padvasya	padvayoḥ	padvānām
Locative	padve	padvayoḥ	padveṣu

Compound padva -

Adverb -padvam -padvāt