Declension table of ?amamatva

Neuter	Singular	Dual	Plural
Nominative	amamatvam	amamatve	amamatvāni
Vocative	amamatva	amamatve	amamatvāni
Accusative	amamatvam	amamatve	amamatvāni
Instrumental	amamatvena	amamatvābhyām	amamatvaiḥ
Dative	amamatvāya	amamatvābhyām	amamatvebhyaḥ
Ablative	amamatvāt	amamatvābhyām	amamatvebhyaḥ
Genitive	amamatvasya	amamatvayoḥ	amamatvānām
Locative	amamatve	amamatvayoḥ	amamatveṣu

Compound amamatva -

Adverb -amamatvam -amamatvāt