Declension table of ?iṣṭatva

Neuter	Singular	Dual	Plural
Nominative	iṣṭatvam	iṣṭatve	iṣṭatvāni
Vocative	iṣṭatva	iṣṭatve	iṣṭatvāni
Accusative	iṣṭatvam	iṣṭatve	iṣṭatvāni
Instrumental	iṣṭatvena	iṣṭatvābhyām	iṣṭatvaiḥ
Dative	iṣṭatvāya	iṣṭatvābhyām	iṣṭatvebhyaḥ
Ablative	iṣṭatvāt	iṣṭatvābhyām	iṣṭatvebhyaḥ
Genitive	iṣṭatvasya	iṣṭatvayoḥ	iṣṭatvānām
Locative	iṣṭatve	iṣṭatvayoḥ	iṣṭatveṣu

Compound iṣṭatva -

Adverb -iṣṭatvam -iṣṭatvāt