Declension table of ?purāṇīya

Neuter	Singular	Dual	Plural
Nominative	purāṇīyam	purāṇīye	purāṇīyāni
Vocative	purāṇīya	purāṇīye	purāṇīyāni
Accusative	purāṇīyam	purāṇīye	purāṇīyāni
Instrumental	purāṇīyena	purāṇīyābhyām	purāṇīyaiḥ
Dative	purāṇīyāya	purāṇīyābhyām	purāṇīyebhyaḥ
Ablative	purāṇīyāt	purāṇīyābhyām	purāṇīyebhyaḥ
Genitive	purāṇīyasya	purāṇīyayoḥ	purāṇīyānām
Locative	purāṇīye	purāṇīyayoḥ	purāṇīyeṣu

Compound purāṇīya -

Adverb -purāṇīyam -purāṇīyāt