Declension table of ?duvasyu

Masculine	Singular	Dual	Plural
Nominative	duvasyuḥ	duvasyū	duvasyavaḥ
Vocative	duvasyo	duvasyū	duvasyavaḥ
Accusative	duvasyum	duvasyū	duvasyūn
Instrumental	duvasyunā	duvasyubhyām	duvasyubhiḥ
Dative	duvasyave	duvasyubhyām	duvasyubhyaḥ
Ablative	duvasyoḥ	duvasyubhyām	duvasyubhyaḥ
Genitive	duvasyoḥ	duvasyvoḥ	duvasyūnām
Locative	duvasyau	duvasyvoḥ	duvasyuṣu

Compound duvasyu -

Adverb -duvasyu