Declension table of ?prasvana

Masculine	Singular	Dual	Plural
Nominative	prasvanaḥ	prasvanau	prasvanāḥ
Vocative	prasvana	prasvanau	prasvanāḥ
Accusative	prasvanam	prasvanau	prasvanān
Instrumental	prasvanena	prasvanābhyām	prasvanaiḥ prasvanebhiḥ
Dative	prasvanāya	prasvanābhyām	prasvanebhyaḥ
Ablative	prasvanāt	prasvanābhyām	prasvanebhyaḥ
Genitive	prasvanasya	prasvanayoḥ	prasvanānām
Locative	prasvane	prasvanayoḥ	prasvaneṣu

Compound prasvana -

Adverb -prasvanam -prasvanāt