Declension table of ?duvasvat

Masculine	Singular	Dual	Plural
Nominative	duvasvān	duvasvantau	duvasvantaḥ
Vocative	duvasvan	duvasvantau	duvasvantaḥ
Accusative	duvasvantam	duvasvantau	duvasvataḥ
Instrumental	duvasvatā	duvasvadbhyām	duvasvadbhiḥ
Dative	duvasvate	duvasvadbhyām	duvasvadbhyaḥ
Ablative	duvasvataḥ	duvasvadbhyām	duvasvadbhyaḥ
Genitive	duvasvataḥ	duvasvatoḥ	duvasvatām
Locative	duvasvati	duvasvatoḥ	duvasvatsu

Compound duvasvat -

Adverb -duvasvantam