Declension table of ?abhūtatva

Neuter	Singular	Dual	Plural
Nominative	abhūtatvam	abhūtatve	abhūtatvāni
Vocative	abhūtatva	abhūtatve	abhūtatvāni
Accusative	abhūtatvam	abhūtatve	abhūtatvāni
Instrumental	abhūtatvena	abhūtatvābhyām	abhūtatvaiḥ
Dative	abhūtatvāya	abhūtatvābhyām	abhūtatvebhyaḥ
Ablative	abhūtatvāt	abhūtatvābhyām	abhūtatvebhyaḥ
Genitive	abhūtatvasya	abhūtatvayoḥ	abhūtatvānām
Locative	abhūtatve	abhūtatvayoḥ	abhūtatveṣu

Compound abhūtatva -

Adverb -abhūtatvam -abhūtatvāt