Declension table of ?sapratyaya

Neuter	Singular	Dual	Plural
Nominative	sapratyayam	sapratyaye	sapratyayāni
Vocative	sapratyaya	sapratyaye	sapratyayāni
Accusative	sapratyayam	sapratyaye	sapratyayāni
Instrumental	sapratyayena	sapratyayābhyām	sapratyayaiḥ
Dative	sapratyayāya	sapratyayābhyām	sapratyayebhyaḥ
Ablative	sapratyayāt	sapratyayābhyām	sapratyayebhyaḥ
Genitive	sapratyayasya	sapratyayayoḥ	sapratyayānām
Locative	sapratyaye	sapratyayayoḥ	sapratyayeṣu

Compound sapratyaya -

Adverb -sapratyayam -sapratyayāt