Declension table of ?āpitva

Neuter	Singular	Dual	Plural
Nominative	āpitvam	āpitve	āpitvāni
Vocative	āpitva	āpitve	āpitvāni
Accusative	āpitvam	āpitve	āpitvāni
Instrumental	āpitvena	āpitvābhyām	āpitvaiḥ
Dative	āpitvāya	āpitvābhyām	āpitvebhyaḥ
Ablative	āpitvāt	āpitvābhyām	āpitvebhyaḥ
Genitive	āpitvasya	āpitvayoḥ	āpitvānām
Locative	āpitve	āpitvayoḥ	āpitveṣu

Compound āpitva -

Adverb -āpitvam -āpitvāt