Declension table of ?pūraṇapratyaya

Masculine	Singular	Dual	Plural
Nominative	pūraṇapratyayaḥ	pūraṇapratyayau	pūraṇapratyayāḥ
Vocative	pūraṇapratyaya	pūraṇapratyayau	pūraṇapratyayāḥ
Accusative	pūraṇapratyayam	pūraṇapratyayau	pūraṇapratyayān
Instrumental	pūraṇapratyayena	pūraṇapratyayābhyām	pūraṇapratyayaiḥ pūraṇapratyayebhiḥ
Dative	pūraṇapratyayāya	pūraṇapratyayābhyām	pūraṇapratyayebhyaḥ
Ablative	pūraṇapratyayāt	pūraṇapratyayābhyām	pūraṇapratyayebhyaḥ
Genitive	pūraṇapratyayasya	pūraṇapratyayayoḥ	pūraṇapratyayānām
Locative	pūraṇapratyaye	pūraṇapratyayayoḥ	pūraṇapratyayeṣu

Compound pūraṇapratyaya -

Adverb -pūraṇapratyayam -pūraṇapratyayāt