Declension table of ?unmattatva

Neuter	Singular	Dual	Plural
Nominative	unmattatvam	unmattatve	unmattatvāni
Vocative	unmattatva	unmattatve	unmattatvāni
Accusative	unmattatvam	unmattatve	unmattatvāni
Instrumental	unmattatvena	unmattatvābhyām	unmattatvaiḥ
Dative	unmattatvāya	unmattatvābhyām	unmattatvebhyaḥ
Ablative	unmattatvāt	unmattatvābhyām	unmattatvebhyaḥ
Genitive	unmattatvasya	unmattatvayoḥ	unmattatvānām
Locative	unmattatve	unmattatvayoḥ	unmattatveṣu

Compound unmattatva -

Adverb -unmattatvam -unmattatvāt