Declension table of ?vivatsya

Masculine	Singular	Dual	Plural
Nominative	vivatsyaḥ	vivatsyau	vivatsyāḥ
Vocative	vivatsya	vivatsyau	vivatsyāḥ
Accusative	vivatsyam	vivatsyau	vivatsyān
Instrumental	vivatsyena	vivatsyābhyām	vivatsyaiḥ vivatsyebhiḥ
Dative	vivatsyāya	vivatsyābhyām	vivatsyebhyaḥ
Ablative	vivatsyāt	vivatsyābhyām	vivatsyebhyaḥ
Genitive	vivatsyasya	vivatsyayoḥ	vivatsyānām
Locative	vivatsye	vivatsyayoḥ	vivatsyeṣu

Compound vivatsya -

Adverb -vivatsyam -vivatsyāt