Declension table of ?sumnāyu

Neuter	Singular	Dual	Plural
Nominative	sumnāyu	sumnāyunī	sumnāyūni
Vocative	sumnāyu	sumnāyunī	sumnāyūni
Accusative	sumnāyu	sumnāyunī	sumnāyūni
Instrumental	sumnāyunā	sumnāyubhyām	sumnāyubhiḥ
Dative	sumnāyune	sumnāyubhyām	sumnāyubhyaḥ
Ablative	sumnāyunaḥ	sumnāyubhyām	sumnāyubhyaḥ
Genitive	sumnāyunaḥ	sumnāyunoḥ	sumnāyūnām
Locative	sumnāyuni	sumnāyunoḥ	sumnāyuṣu

Compound sumnāyu -

Adverb -sumnāyu