Declension table of ?duvasyu

Neuter	Singular	Dual	Plural
Nominative	duvasyu	duvasyunī	duvasyūni
Vocative	duvasyu	duvasyunī	duvasyūni
Accusative	duvasyu	duvasyunī	duvasyūni
Instrumental	duvasyunā	duvasyubhyām	duvasyubhiḥ
Dative	duvasyune	duvasyubhyām	duvasyubhyaḥ
Ablative	duvasyunaḥ	duvasyubhyām	duvasyubhyaḥ
Genitive	duvasyunaḥ	duvasyunoḥ	duvasyūnām
Locative	duvasyuni	duvasyunoḥ	duvasyuṣu

Compound duvasyu -

Adverb -duvasyu