Declension table of ?vapuna

Masculine	Singular	Dual	Plural
Nominative	vapunaḥ	vapunau	vapunāḥ
Vocative	vapuna	vapunau	vapunāḥ
Accusative	vapunam	vapunau	vapunān
Instrumental	vapunena	vapunābhyām	vapunaiḥ vapunebhiḥ
Dative	vapunāya	vapunābhyām	vapunebhyaḥ
Ablative	vapunāt	vapunābhyām	vapunebhyaḥ
Genitive	vapunasya	vapunayoḥ	vapunānām
Locative	vapune	vapunayoḥ	vapuneṣu

Compound vapuna -

Adverb -vapunam -vapunāt