Declension table of ?sasvana

Neuter	Singular	Dual	Plural
Nominative	sasvanam	sasvane	sasvanāni
Vocative	sasvana	sasvane	sasvanāni
Accusative	sasvanam	sasvane	sasvanāni
Instrumental	sasvanena	sasvanābhyām	sasvanaiḥ
Dative	sasvanāya	sasvanābhyām	sasvanebhyaḥ
Ablative	sasvanāt	sasvanābhyām	sasvanebhyaḥ
Genitive	sasvanasya	sasvanayoḥ	sasvanānām
Locative	sasvane	sasvanayoḥ	sasvaneṣu

Compound sasvana -

Adverb -sasvanam -sasvanāt