Declension table of ?dhvanitva

Neuter	Singular	Dual	Plural
Nominative	dhvanitvam	dhvanitve	dhvanitvāni
Vocative	dhvanitva	dhvanitve	dhvanitvāni
Accusative	dhvanitvam	dhvanitve	dhvanitvāni
Instrumental	dhvanitvena	dhvanitvābhyām	dhvanitvaiḥ
Dative	dhvanitvāya	dhvanitvābhyām	dhvanitvebhyaḥ
Ablative	dhvanitvāt	dhvanitvābhyām	dhvanitvebhyaḥ
Genitive	dhvanitvasya	dhvanitvayoḥ	dhvanitvānām
Locative	dhvanitve	dhvanitvayoḥ	dhvanitveṣu

Compound dhvanitva -

Adverb -dhvanitvam -dhvanitvāt