Declension table of ?upaśaya

Masculine	Singular	Dual	Plural
Nominative	upaśayaḥ	upaśayau	upaśayāḥ
Vocative	upaśaya	upaśayau	upaśayāḥ
Accusative	upaśayam	upaśayau	upaśayān
Instrumental	upaśayena	upaśayābhyām	upaśayaiḥ upaśayebhiḥ
Dative	upaśayāya	upaśayābhyām	upaśayebhyaḥ
Ablative	upaśayāt	upaśayābhyām	upaśayebhyaḥ
Genitive	upaśayasya	upaśayayoḥ	upaśayānām
Locative	upaśaye	upaśayayoḥ	upaśayeṣu

Compound upaśaya -

Adverb -upaśayam -upaśayāt