Declension table of ?niṣṇātatva

Neuter	Singular	Dual	Plural
Nominative	niṣṇātatvam	niṣṇātatve	niṣṇātatvāni
Vocative	niṣṇātatva	niṣṇātatve	niṣṇātatvāni
Accusative	niṣṇātatvam	niṣṇātatve	niṣṇātatvāni
Instrumental	niṣṇātatvena	niṣṇātatvābhyām	niṣṇātatvaiḥ
Dative	niṣṇātatvāya	niṣṇātatvābhyām	niṣṇātatvebhyaḥ
Ablative	niṣṇātatvāt	niṣṇātatvābhyām	niṣṇātatvebhyaḥ
Genitive	niṣṇātatvasya	niṣṇātatvayoḥ	niṣṇātatvānām
Locative	niṣṇātatve	niṣṇātatvayoḥ	niṣṇātatveṣu

Compound niṣṇātatva -

Adverb -niṣṇātatvam -niṣṇātatvāt