Declension table of ?purāṇīya

Masculine	Singular	Dual	Plural
Nominative	purāṇīyaḥ	purāṇīyau	purāṇīyāḥ
Vocative	purāṇīya	purāṇīyau	purāṇīyāḥ
Accusative	purāṇīyam	purāṇīyau	purāṇīyān
Instrumental	purāṇīyena	purāṇīyābhyām	purāṇīyaiḥ purāṇīyebhiḥ
Dative	purāṇīyāya	purāṇīyābhyām	purāṇīyebhyaḥ
Ablative	purāṇīyāt	purāṇīyābhyām	purāṇīyebhyaḥ
Genitive	purāṇīyasya	purāṇīyayoḥ	purāṇīyānām
Locative	purāṇīye	purāṇīyayoḥ	purāṇīyeṣu

Compound purāṇīya -

Adverb -purāṇīyam -purāṇīyāt