Declension table of ?vivāhatattva

Neuter	Singular	Dual	Plural
Nominative	vivāhatattvam	vivāhatattve	vivāhatattvāni
Vocative	vivāhatattva	vivāhatattve	vivāhatattvāni
Accusative	vivāhatattvam	vivāhatattve	vivāhatattvāni
Instrumental	vivāhatattvena	vivāhatattvābhyām	vivāhatattvaiḥ
Dative	vivāhatattvāya	vivāhatattvābhyām	vivāhatattvebhyaḥ
Ablative	vivāhatattvāt	vivāhatattvābhyām	vivāhatattvebhyaḥ
Genitive	vivāhatattvasya	vivāhatattvayoḥ	vivāhatattvānām
Locative	vivāhatattve	vivāhatattvayoḥ	vivāhatattveṣu

Compound vivāhatattva -

Adverb -vivāhatattvam -vivāhatattvāt