Declension table of ?prathasvat

Masculine	Singular	Dual	Plural
Nominative	prathasvān	prathasvantau	prathasvantaḥ
Vocative	prathasvan	prathasvantau	prathasvantaḥ
Accusative	prathasvantam	prathasvantau	prathasvataḥ
Instrumental	prathasvatā	prathasvadbhyām	prathasvadbhiḥ
Dative	prathasvate	prathasvadbhyām	prathasvadbhyaḥ
Ablative	prathasvataḥ	prathasvadbhyām	prathasvadbhyaḥ
Genitive	prathasvataḥ	prathasvatoḥ	prathasvatām
Locative	prathasvati	prathasvatoḥ	prathasvatsu

Compound prathasvat -

Adverb -prathasvantam