Declension table of ?śakyatva

Neuter	Singular	Dual	Plural
Nominative	śakyatvam	śakyatve	śakyatvāni
Vocative	śakyatva	śakyatve	śakyatvāni
Accusative	śakyatvam	śakyatve	śakyatvāni
Instrumental	śakyatvena	śakyatvābhyām	śakyatvaiḥ
Dative	śakyatvāya	śakyatvābhyām	śakyatvebhyaḥ
Ablative	śakyatvāt	śakyatvābhyām	śakyatvebhyaḥ
Genitive	śakyatvasya	śakyatvayoḥ	śakyatvānām
Locative	śakyatve	śakyatvayoḥ	śakyatveṣu

Compound śakyatva -

Adverb -śakyatvam -śakyatvāt