Declension table of ?apitva

Neuter	Singular	Dual	Plural
Nominative	apitvam	apitve	apitvāni
Vocative	apitva	apitve	apitvāni
Accusative	apitvam	apitve	apitvāni
Instrumental	apitvena	apitvābhyām	apitvaiḥ
Dative	apitvāya	apitvābhyām	apitvebhyaḥ
Ablative	apitvāt	apitvābhyām	apitvebhyaḥ
Genitive	apitvasya	apitvayoḥ	apitvānām
Locative	apitve	apitvayoḥ	apitveṣu

Compound apitva -

Adverb -apitvam -apitvāt