Declension table of ?cupa

Masculine	Singular	Dual	Plural
Nominative	cupaḥ	cupau	cupāḥ
Vocative	cupa	cupau	cupāḥ
Accusative	cupam	cupau	cupān
Instrumental	cupena	cupābhyām	cupaiḥ cupebhiḥ
Dative	cupāya	cupābhyām	cupebhyaḥ
Ablative	cupāt	cupābhyām	cupebhyaḥ
Genitive	cupasya	cupayoḥ	cupānām
Locative	cupe	cupayoḥ	cupeṣu

Compound cupa -

Adverb -cupam -cupāt