Declension table of ?sumāya

Masculine	Singular	Dual	Plural
Nominative	sumāyaḥ	sumāyau	sumāyāḥ
Vocative	sumāya	sumāyau	sumāyāḥ
Accusative	sumāyam	sumāyau	sumāyān
Instrumental	sumāyena	sumāyābhyām	sumāyaiḥ sumāyebhiḥ
Dative	sumāyāya	sumāyābhyām	sumāyebhyaḥ
Ablative	sumāyāt	sumāyābhyām	sumāyebhyaḥ
Genitive	sumāyasya	sumāyayoḥ	sumāyānām
Locative	sumāye	sumāyayoḥ	sumāyeṣu

Compound sumāya -

Adverb -sumāyam -sumāyāt