Declension table of ?plavatva

Neuter	Singular	Dual	Plural
Nominative	plavatvam	plavatve	plavatvāni
Vocative	plavatva	plavatve	plavatvāni
Accusative	plavatvam	plavatve	plavatvāni
Instrumental	plavatvena	plavatvābhyām	plavatvaiḥ
Dative	plavatvāya	plavatvābhyām	plavatvebhyaḥ
Ablative	plavatvāt	plavatvābhyām	plavatvebhyaḥ
Genitive	plavatvasya	plavatvayoḥ	plavatvānām
Locative	plavatve	plavatvayoḥ	plavatveṣu

Compound plavatva -

Adverb -plavatvam -plavatvāt