Declension table of sumna

Masculine	Singular	Dual	Plural
Nominative	sumnaḥ	sumnau	sumnāḥ
Vocative	sumna	sumnau	sumnāḥ
Accusative	sumnam	sumnau	sumnān
Instrumental	sumnena	sumnābhyām	sumnaiḥ sumnebhiḥ
Dative	sumnāya	sumnābhyām	sumnebhyaḥ
Ablative	sumnāt	sumnābhyām	sumnebhyaḥ
Genitive	sumnasya	sumnayoḥ	sumnānām
Locative	sumne	sumnayoḥ	sumneṣu

Compound sumna -

Adverb -sumnam -sumnāt