Declension table of ?vivatsu

Masculine	Singular	Dual	Plural
Nominative	vivatsuḥ	vivatsū	vivatsavaḥ
Vocative	vivatso	vivatsū	vivatsavaḥ
Accusative	vivatsum	vivatsū	vivatsūn
Instrumental	vivatsunā	vivatsubhyām	vivatsubhiḥ
Dative	vivatsave	vivatsubhyām	vivatsubhyaḥ
Ablative	vivatsoḥ	vivatsubhyām	vivatsubhyaḥ
Genitive	vivatsoḥ	vivatsvoḥ	vivatsūnām
Locative	vivatsau	vivatsvoḥ	vivatsuṣu

Compound vivatsu -

Adverb -vivatsu