Declension table of ?kuśalatva

Neuter	Singular	Dual	Plural
Nominative	kuśalatvam	kuśalatve	kuśalatvāni
Vocative	kuśalatva	kuśalatve	kuśalatvāni
Accusative	kuśalatvam	kuśalatve	kuśalatvāni
Instrumental	kuśalatvena	kuśalatvābhyām	kuśalatvaiḥ
Dative	kuśalatvāya	kuśalatvābhyām	kuśalatvebhyaḥ
Ablative	kuśalatvāt	kuśalatvābhyām	kuśalatvebhyaḥ
Genitive	kuśalatvasya	kuśalatvayoḥ	kuśalatvānām
Locative	kuśalatve	kuśalatvayoḥ	kuśalatveṣu

Compound kuśalatva -

Adverb -kuśalatvam -kuśalatvāt