Declension table of tantutva

Neuter	Singular	Dual	Plural
Nominative	tantutvam	tantutve	tantutvāni
Vocative	tantutva	tantutve	tantutvāni
Accusative	tantutvam	tantutve	tantutvāni
Instrumental	tantutvena	tantutvābhyām	tantutvaiḥ
Dative	tantutvāya	tantutvābhyām	tantutvebhyaḥ
Ablative	tantutvāt	tantutvābhyām	tantutvebhyaḥ
Genitive	tantutvasya	tantutvayoḥ	tantutvānām
Locative	tantutve	tantutvayoḥ	tantutveṣu

Compound tantutva -

Adverb -tantutvam -tantutvāt