Declension table of ?dumbaka

Masculine	Singular	Dual	Plural
Nominative	dumbakaḥ	dumbakau	dumbakāḥ
Vocative	dumbaka	dumbakau	dumbakāḥ
Accusative	dumbakam	dumbakau	dumbakān
Instrumental	dumbakena	dumbakābhyām	dumbakaiḥ dumbakebhiḥ
Dative	dumbakāya	dumbakābhyām	dumbakebhyaḥ
Ablative	dumbakāt	dumbakābhyām	dumbakebhyaḥ
Genitive	dumbakasya	dumbakayoḥ	dumbakānām
Locative	dumbake	dumbakayoḥ	dumbakeṣu

Compound dumbaka -

Adverb -dumbakam -dumbakāt