Declension table of ?saṃvṛtatva

Neuter	Singular	Dual	Plural
Nominative	saṃvṛtatvam	saṃvṛtatve	saṃvṛtatvāni
Vocative	saṃvṛtatva	saṃvṛtatve	saṃvṛtatvāni
Accusative	saṃvṛtatvam	saṃvṛtatve	saṃvṛtatvāni
Instrumental	saṃvṛtatvena	saṃvṛtatvābhyām	saṃvṛtatvaiḥ
Dative	saṃvṛtatvāya	saṃvṛtatvābhyām	saṃvṛtatvebhyaḥ
Ablative	saṃvṛtatvāt	saṃvṛtatvābhyām	saṃvṛtatvebhyaḥ
Genitive	saṃvṛtatvasya	saṃvṛtatvayoḥ	saṃvṛtatvānām
Locative	saṃvṛtatve	saṃvṛtatvayoḥ	saṃvṛtatveṣu

Compound saṃvṛtatva -

Adverb -saṃvṛtatvam -saṃvṛtatvāt