Declension table of ?sumadhura

Masculine	Singular	Dual	Plural
Nominative	sumadhuraḥ	sumadhurau	sumadhurāḥ
Vocative	sumadhura	sumadhurau	sumadhurāḥ
Accusative	sumadhuram	sumadhurau	sumadhurān
Instrumental	sumadhureṇa	sumadhurābhyām	sumadhuraiḥ sumadhurebhiḥ
Dative	sumadhurāya	sumadhurābhyām	sumadhurebhyaḥ
Ablative	sumadhurāt	sumadhurābhyām	sumadhurebhyaḥ
Genitive	sumadhurasya	sumadhurayoḥ	sumadhurāṇām
Locative	sumadhure	sumadhurayoḥ	sumadhureṣu

Compound sumadhura -

Adverb -sumadhuram -sumadhurāt