Declension table of ?viśna

Masculine	Singular	Dual	Plural
Nominative	viśnaḥ	viśnau	viśnāḥ
Vocative	viśna	viśnau	viśnāḥ
Accusative	viśnam	viśnau	viśnān
Instrumental	viśnena	viśnābhyām	viśnaiḥ viśnebhiḥ
Dative	viśnāya	viśnābhyām	viśnebhyaḥ
Ablative	viśnāt	viśnābhyām	viśnebhyaḥ
Genitive	viśnasya	viśnayoḥ	viśnānām
Locative	viśne	viśnayoḥ	viśneṣu

Compound viśna -

Adverb -viśnam -viśnāt