Declension table of ?viprasanna

Neuter	Singular	Dual	Plural
Nominative	viprasannam	viprasanne	viprasannāni
Vocative	viprasanna	viprasanne	viprasannāni
Accusative	viprasannam	viprasanne	viprasannāni
Instrumental	viprasannena	viprasannābhyām	viprasannaiḥ
Dative	viprasannāya	viprasannābhyām	viprasannebhyaḥ
Ablative	viprasannāt	viprasannābhyām	viprasannebhyaḥ
Genitive	viprasannasya	viprasannayoḥ	viprasannānām
Locative	viprasanne	viprasannayoḥ	viprasanneṣu

Compound viprasanna -

Adverb -viprasannam -viprasannāt