Declension table of ?aṣṭatva

Neuter	Singular	Dual	Plural
Nominative	aṣṭatvam	aṣṭatve	aṣṭatvāni
Vocative	aṣṭatva	aṣṭatve	aṣṭatvāni
Accusative	aṣṭatvam	aṣṭatve	aṣṭatvāni
Instrumental	aṣṭatvena	aṣṭatvābhyām	aṣṭatvaiḥ
Dative	aṣṭatvāya	aṣṭatvābhyām	aṣṭatvebhyaḥ
Ablative	aṣṭatvāt	aṣṭatvābhyām	aṣṭatvebhyaḥ
Genitive	aṣṭatvasya	aṣṭatvayoḥ	aṣṭatvānām
Locative	aṣṭatve	aṣṭatvayoḥ	aṣṭatveṣu

Compound aṣṭatva -

Adverb -aṣṭatvam -aṣṭatvāt